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Boats & Streams Quiz 1

Question 1

Time: 00:00:00
A boat can travel at a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

2 hours

2 hours

3 hours

3 hours

4 hours

4 hours

5 hours

5 hours

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Question 2

Time: 00:00:00
The speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:

16 hours

16 hours

18 hours

18 hours

20 hours

20 hours

24 hours

24 hours

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Question 3

Time: 00:00:00
A man takes twice as long to row a distance against the stream as to row the same distance in favor of the stream. The ratio of the speed of the boat (in still water) and the stream is:

2:1

2:1

3:1

3:1

3:2

3:2

4:3

4:3

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Question 4

Time: 00:00:00
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and comes back, how far is the place?

2.4 km

2.4 km

2.5 km

2.5 km

3 km

3 km

3.6 km

3.6 km

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Question 5

Time: 00:00:00
A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?

4 km/hr

4 km/hr

6 km/hr

6 km/hr

8 km/hr

8 km/hr

10 km/hr

10 km/hr

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Question 6

Time: 00:00:00
A man rows to a place 48 km distant and comes back in 14 hours. He finds that he can row 4 km with the stream at the same time as 3 km against the stream. The rate of the stream is

1 km/hr

1 km/hr

1.5 km/hr

1.5 km/hr

2 km/hr

2 km/hr

2.5 km/hr

2.5 km/hr

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Question 7

Time: 00:00:00
A boat travels from point A to B, a distance of 12 km. From A it travels 4 km downstream in 15 minutes and the remaining 8 km upstream to reach B. If the downstream speed is twice as high as the upstream speed, what is the average speed of the boat for the journey from A to B?

10(2/3) km/hr

10(2/3) km/hr

9.6 km/hr

9.6 km/hr

11.16 km/hr

11.16 km/hr

10.44 km/hr

10.44 km/hr

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Question 8

Time: 00:00:00
A motorboat can travel at 5 km/hr in still water. It traveled 90 km downstream in a river and then returned, taking altogether 100 hours. Find the rate of flow of the river.

3 km/hr

3 km/hr

2.5 km/hr

2.5 km/hr

2 km/hr

2 km/hr

4 km/hr

4 km/hr

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Question 9

Time: 00:00:00
A man rows ‘k’ km upstream and back again downstream to the same point in H hours. The speed of rowing in still water is s km/hr and the rate of stream is r km/hr. Then

\left ( s^{2}-r^{2} \right )=2sk/H

\left ( s^{2}-r^{2} \right )=2sk/H

(r + s) = kH / (r -s)

(r + s) = kH / (r -s)

rs=kH

rs=kH

None of these

None of these

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Question 10

Time: 00:00:00
A man can row 30 km upstream in 6 hours. If the speed of the man in still water is 6 km/hr, find how much he can row downstream in 10 hours.

70 km

70 km

140 km

140 km

200 km

200 km

250 km

250 km

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["0","40","60","80","100"]
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