Boats and Streams MCQ Set 2

Showing question 6 to 10 of total 30 MCQs

Solve the question on your notebook and check it by clicking (Answer and Explanation) below question.

Question No: 6

A man can row

kmph in still water and finds that it takes him thrice as much time to row up than as to row, down the same distance in the river. The speed of the current is.

Answer: B

Explanation

Friends first we should analyse quickly that what we need to calculate and what values we require to get it.

So here we need to get speed of current, for that we will need speed downstream and speed upstream,

because we know

Speed of current = 1/2(a-b) [important]

Let the speed upstream = x kmph

Then speed downstream is = 3x kmph [as per question]

So,

Speed upstream = 14/3 km/hr, Speed downstream 14 km/hr.

Speed of the current

Question No: 7

A man rows 750 m in 675 seconds against the stream and returns in 7 and half minutes. His rowing speed in still water is

1. 4 kmph
2. 5 kmph
3. 6 kmph
4. 7 kmph

Question No: 8

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is

1. 12 kmph
2. 13 kmph
3. 14 kmph
4. 15 kmph

Question No: 9

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is

1. 12 kmph
2. 13 kmph
3. 14 kmph
4. 15 kmph

Question No: 10

A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat in still water and stream is

1. 3:1
2. 1:3
3. 2:4
4. 4:2