DELHI POLICE CONSTABLE QUANT (BOAT AND STREAM) QUIZ-12

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Question 1:

Down stream speed of boat is $14 \mathrm{~km} / \mathrm{h}$. Upstream speed of boat is $10 \mathrm{~km} / \mathrm{h}$. In how much time can it cover $72 \mathrm{~km}$ in still water?

Question 2:

The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes. Find the speed of the stream.

Question 3:

The speed of motorboat in still water is $40 \mathrm{~km} /$ h. It travels $300 \mathrm{~km}$ downstream and then returns to the starting point. If the round trip takes a total of 16 hours. What is the speed of the stream of the river?

Question 4:

A man can row at the rate of 9km/h in still water. If the speed of the current is 5 km/h , then he takes 25 hours more in upstream than downstream. The distance is :

Question 5:

A man can row $30 \mathrm{~km}$ upstream in 6 hours. If the speed of the man in still water is $6 \mathrm{~km} / \mathrm{hr}$, find how much he can row downstream in 5 hours.

Question 6:

A boat covers 40 km in 8 hours along the current and 18 km in 6 hours against the current. What is the speed of the current?

Question 7:

A man cover a certain distance in 5 hours Downstream and cover the same distance in 8 hours Upstream. If speed of water is $39 \mathrm{~km} / \mathrm{h}$ then find speed of man.

Question 8:

A boat covers $12 \mathrm{~km}$ upstream and $18 \mathrm{~km}$ downstream in 3 hours, while it covers 36 km upstream and 24 km down-stream in $6 \frac{1}{2}$ hours. What is the speed of the current?

Question 9:

A man can row $900 \mathrm{~m}$ against the stream in 12 minute and returns to the same point in 9 minute. What is the speed of stream in km/hr?

Question 10:

A boat goes 70km downstream in 14 hours and a distance of 48km upstream in 12 hours. Find the speed of the stream. (In kmph )