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SSC

Q. A bird is to flying as a fish is to _____.

A. swimming
B. jumping
C. running
D. crawling

Solution

Birds fly, and fish swim; both are actions characteristic of the respective animals.

Correct Answer: A — swimming

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Q. A boat can travel 100 km downstream in 5 hours. If the speed of the stream is 10 km/h, what is the speed of the boat in still water?

A. 20 km/h
B. 30 km/h
C. 40 km/h
D. 50 km/h

Solution

Speed downstream = Distance / Time = 100 / 5 = 20 km/h. Speed of boat = Speed downstream - Speed of stream = 20 - 10 = 10 km/h.

Correct Answer: C — 40 km/h

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Q. A boat can travel 100 km downstream in 8 hours. If the speed of the current is 2 km/h, what is the speed of the boat in still water?

A. 10 km/h
B. 12 km/h
C. 14 km/h
D. 16 km/h

Solution

Speed downstream = 100 / 8 = 12.5 km/h. Speed in still water = Speed downstream - Speed of current = 12.5 - 2 = 10.5 km/h.

Correct Answer: B — 12 km/h

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Q. A boat can travel 100 km downstream in 8 hours. If the speed of the stream is 3 km/h, what is the speed of the boat in still water?

A. 10 km/h
B. 12 km/h
C. 15 km/h
D. 18 km/h

Solution

Speed downstream = Distance / Time = 100 / 8 = 12.5 km/h. Speed of boat = Speed downstream - Speed of stream = 12.5 - 3 = 9.5 km/h.

Correct Answer: C — 15 km/h

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Q. A boat can travel 20 km downstream in 1 hour. If the speed of the current is 5 km/h, what is the speed of the boat in still water?

A. 10 km/h
B. 15 km/h
C. 20 km/h
D. 25 km/h

Solution

Speed downstream = 20 km/h. Speed of boat in still water = Speed downstream - Speed of current = 20 km/h - 5 km/h = 15 km/h.

Correct Answer: C — 20 km/h

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Q. A boat can travel 20 km upstream in 4 hours. If the speed of the current is 2 km/h, what is the speed of the boat in still water?

A. 4 km/h
B. 6 km/h
C. 8 km/h
D. 10 km/h

Solution

Speed upstream = 20 / 4 = 5 km/h. Speed in still water = Speed upstream + Speed of current = 5 + 2 = 7 km/h.

Correct Answer: C — 8 km/h

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Q. A boat can travel 20 km upstream in 5 hours. If the speed of the stream is 3 km/h, what is the speed of the boat in still water?

A. 5 km/h
B. 7 km/h
C. 8 km/h
D. 10 km/h

Solution

Speed upstream = 20 km / 5 h = 4 km/h. Let speed of boat = x, then x - 3 = 4, so x = 7 km/h.

Correct Answer: B — 7 km/h

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Q. A boat can travel 24 km upstream in 6 hours. If the speed of the stream is 2 km/h, what is the speed of the boat in still water?

A. 4 km/h
B. 6 km/h
C. 8 km/h
D. 10 km/h

Solution

Speed upstream = 24 / 6 = 4 km/h. Speed of boat = Speed upstream + Speed of stream = 4 + 2 = 6 km/h.

Correct Answer: C — 8 km/h

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Q. A boat can travel 30 km upstream in 2 hours. What is the speed of the boat in still water if the speed of the current is 3 km/h? (2020)

A. 12 km/h
B. 15 km/h
C. 18 km/h
D. 21 km/h

Solution

Speed upstream = Speed of boat - Speed of current. Speed of boat = 30 km / 2 h + 3 km/h = 15 km/h.

Correct Answer: B — 15 km/h

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Q. A boat can travel 30 km upstream in 2 hours. What is the speed of the current if the speed of the boat in still water is 15 km/h?

A. 2.5 km/h
B. 3 km/h
C. 3.5 km/h
D. 4 km/h

Solution

Speed upstream = Speed of boat - Speed of current. Speed upstream = 30 km / 2 h = 15 km/h. Therefore, 15 km/h - Speed of current = 15 km/h, so Speed of current = 0 km/h.

Correct Answer: B — 3 km/h

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Q. A boat can travel 36 km downstream in 2 hours. If the speed of the stream is 6 km/h, what is the speed of the boat in still water?

A. 12 km/h
B. 15 km/h
C. 18 km/h
D. 21 km/h

Solution

Speed downstream = 36 / 2 = 18 km/h. Speed of boat = Speed downstream - Speed of stream = 18 - 6 = 12 km/h.

Correct Answer: C — 18 km/h

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Q. A boat can travel 40 km downstream in 2 hours. If the speed of the current is 4 km/h, what is the speed of the boat in still water?

A. 12 km/h
B. 16 km/h
C. 20 km/h
D. 24 km/h

Solution

Speed downstream = 40 km / 2 h = 20 km/h. Speed of boat in still water = Speed downstream - Speed of current = 20 km/h - 4 km/h = 16 km/h.

Correct Answer: B — 16 km/h

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Q. A boat can travel 40 km downstream in 2 hours. If the speed of the stream is 5 km/h, what is the speed of the boat in still water?

A. 15 km/h
B. 20 km/h
C. 25 km/h
D. 30 km/h

Solution

Speed downstream = Distance / Time = 40 / 2 = 20 km/h. Speed of boat = Speed downstream - Speed of stream = 20 - 5 = 15 km/h.

Correct Answer: B — 20 km/h

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Q. A boat can travel 40 km downstream in 2 hours. If the speed of the stream is 8 km/h, what is the speed of the boat in still water?

A. 12 km/h
B. 16 km/h
C. 20 km/h
D. 24 km/h

Solution

Speed downstream = 40 / 2 = 20 km/h. Speed of boat = Speed downstream - Speed of stream = 20 - 8 = 12 km/h.

Correct Answer: C — 20 km/h

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Q. A boat can travel 48 km downstream in 2 hours. If the speed of the stream is 4 km/h, what is the speed of the boat in still water?

A. 20 km/h
B. 22 km/h
C. 24 km/h
D. 26 km/h

Solution

Speed downstream = Distance / Time = 48 km / 2 h = 24 km/h. Speed of boat = Speed downstream - Speed of stream = 24 - 4 = 20 km/h.

Correct Answer: C — 24 km/h

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Q. A boat can travel 48 km downstream in 2 hours. What is the speed of the stream if the speed of the boat in still water is 20 km/h?

A. 4 km/h
B. 8 km/h
C. 12 km/h
D. 16 km/h

Solution

Speed downstream = Distance / Time = 48 / 2 = 24 km/h. Speed of stream = Speed downstream - Speed of boat = 24 - 20 = 4 km/h.

Correct Answer: B — 8 km/h

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Q. A boat can travel 48 km downstream in 4 hours. If the speed of the stream is 4 km/h, what is the speed of the boat in still water?

A. 8 km/h
B. 10 km/h
C. 12 km/h
D. 16 km/h

Solution

Speed downstream = 48 / 4 = 12 km/h. Speed of boat = Speed downstream - Speed of stream = 12 - 4 = 8 km/h.

Correct Answer: C — 12 km/h

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Q. A boat can travel 48 km downstream in 4 hours. If the speed of the stream is 6 km/h, what is the speed of the boat in still water?

A. 10 km/h
B. 12 km/h
C. 14 km/h
D. 16 km/h

Solution

Speed downstream = 48 / 4 = 12 km/h. Speed of boat = Speed downstream - Speed of stream = 12 - 6 = 6 km/h.

Correct Answer: C — 14 km/h

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Q. A boat can travel 48 km downstream in 4 hours. What is the speed of the current if the speed of the boat in still water is 10 km/h?

A. 2 km/h
B. 4 km/h
C. 6 km/h
D. 8 km/h

Solution

Speed downstream = Distance/Time = 48 km / 4 hours = 12 km/h. Speed of current = Speed downstream - Speed in still water = 12 km/h - 10 km/h = 2 km/h.

Correct Answer: C — 6 km/h

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Q. A boat can travel 80 km downstream in 4 hours. If the speed of the stream is 4 km/h, what is the speed of the boat in still water?

A. 16 km/h
B. 20 km/h
C. 24 km/h
D. 28 km/h

Solution

Speed downstream = Distance / Time = 80 / 4 = 20 km/h. Speed of boat = Speed downstream - Speed of stream = 20 - 4 = 16 km/h.

Correct Answer: B — 20 km/h

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Q. A boat can travel 80 km downstream in 4 hours. If the speed of the stream is 8 km/h, what is the speed of the boat in still water?

A. 16 km/h
B. 20 km/h
C. 24 km/h
D. 28 km/h

Solution

Speed downstream = 80 km / 4 h = 20 km/h. Speed of boat = Speed downstream - Speed of stream = 20 - 8 = 12 km/h.

Correct Answer: B — 20 km/h

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Q. A boat can travel 80 km upstream in 10 hours. If the speed of the current is 4 km/h, what is the speed of the boat in still water?

A. 8 km/h
B. 10 km/h
C. 12 km/h
D. 14 km/h

Solution

Speed upstream = 80 / 10 = 8 km/h. Speed in still water = Speed upstream + Speed of current = 8 + 4 = 12 km/h.

Correct Answer: B — 10 km/h

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Q. A boat can travel at 15 km/h in still water. If it goes upstream against a current of 3 km/h, what is its effective speed?

A. 10 km/h
B. 12 km/h
C. 15 km/h
D. 18 km/h

Solution

Effective speed upstream = Speed in still water - Speed of current = 15 km/h - 3 km/h = 12 km/h.

Correct Answer: A — 10 km/h

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Q. A boat can travel at 15 km/h in still water. If it goes upstream against a current of 3 km/h, what is its speed upstream?

A. 10 km/h
B. 12 km/h
C. 15 km/h
D. 18 km/h

Solution

Upstream speed = Speed in still water - Speed of current = 15 km/h - 3 km/h = 12 km/h.

Correct Answer: A — 10 km/h

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Q. A boat can travel at 30 km/h in still water. If it goes upstream against a current of 10 km/h, what is its speed relative to the bank?

A. 20 km/h
B. 25 km/h
C. 30 km/h
D. 35 km/h

Solution

Upstream speed = Speed in still water - Speed of current = 30 km/h - 10 km/h = 20 km/h.

Correct Answer: A — 20 km/h

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Q. A boat can travel at 30 km/h in still water. If it goes upstream against a current of 6 km/h, what is its speed relative to the bank?

A. 24 km/h
B. 26 km/h
C. 30 km/h
D. 36 km/h

Solution

Upstream speed = Speed in still water - Speed of current = 30 km/h - 6 km/h = 24 km/h.

Correct Answer: A — 24 km/h

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Q. A boat can travel at a speed of 10 km/h in still water. If the speed of the current is 2 km/h, what is the speed of the boat upstream?

A. 8 km/h
B. 10 km/h
C. 12 km/h
D. 14 km/h

Solution

Speed upstream = Speed in still water - Speed of current = 10 - 2 = 8 km/h.

Correct Answer: A — 8 km/h

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Q. A boat can travel at a speed of 10 km/h in still water. If the speed of the stream is 2 km/h, what is the speed of the boat downstream?

A. 8 km/h
B. 10 km/h
C. 12 km/h
D. 14 km/h

Solution

Speed downstream = Speed of boat + Speed of stream = 10 + 2 = 12 km/h.

Correct Answer: C — 12 km/h

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Q. A boat can travel at a speed of 15 km/h in still water. If it goes downstream, its speed increases by 5 km/h. What is its speed downstream?

A. 15 km/h
B. 20 km/h
C. 25 km/h
D. 30 km/h

Solution

Speed downstream = Speed in still water + Speed increase = 15 km/h + 5 km/h = 20 km/h.

Correct Answer: B — 20 km/h

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Q. A boat can travel at a speed of 15 km/h in still water. If the speed of the stream is 5 km/h, what is the speed of the boat downstream?

A. 10 km/h
B. 15 km/h
C. 20 km/h
D. 25 km/h

Solution

Speed downstream = Speed of boat + Speed of stream = 15 + 5 = 20 km/h.

Correct Answer: C — 20 km/h

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