A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water?

A. 2 kmph

B. 8 kmph

C. 16 kmph

D. 4 kmph

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A boat can move upstream at 25 kmph and downstream at 35 kmph, then the speed of the current is?

A. 5 kmph

B. 10 kmph

C. 30 kmph

D. 15 kmph

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A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the speed of the man in still water?

A. 60 kmph

B. 10 kmph

C. 30 kmph

D. 5 kmph

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A man can row with a speed of 15 kmph in still water. If the stream flows at 5 kmph, then the speed in downstream is?

A. 10 kmph

B. 5 kmph

C. 20 kmph

D. 22 kmph

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A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?

A. 7 km/h

B. 5 km/h

C. 3 km/h

D. 2 (1/2) km/h

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A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how many hours will the man take to swim back against the current for 6km?

A. 3

B. 4

C. 4 (1/2)

D. Insufficient data

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Two pipes X and Y can separately fill a cistern in 18 and 24 hours respectively. If they are turned on alternately for one hour each, how long will it take to fill the cistern?

A. 20 hours 30 min

B. 24 hours

C. 18 hours 30 min

D. 16 hours

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If 12 men and 16 boys can do a piece of work in 5 days and 13 men together will 24 boys can do it in 4 days. Compare the daily work done by a man with that of a boy.?

A. 4:3

B. 2:1

C. 1:2

D. 2:5

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Some persons can do a piece of work in 12 days. Two times the number of these people will do half of that work in?

A. 3 days

B. 4 days

C. 6 days

D. 12 days

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15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take to do the same. If 3 women do as much work as 2 men?

A. 10

B. 20

C. 30

D. 40

Detail - No Details

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