UP POLICE CONSTABLE QUANT (BOAT AND STREAM) QUIZ-3

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Question 1:

The time taken by a boat to travel $13 \mathrm{~km}$ downstream is the same as time taken by it to travel $7 \mathrm{~km}$ upstream. If the speed of the stream is $3 \mathrm{~km} / \mathrm{h}$, then how much time (in hours) will it take to travel a distance of $44.8 \mathrm{~km}$ in still water ?

Question 2:

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 3:

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 )

Question 4:

A motor boat has speed $30 \mathrm{~km} / \mathrm{h}$ in still water. It goes $60 \mathrm{~km}$ down stream and comes back in $\frac{9}{2}$ h. What is the speed of the stream?

Question 5:

A boat goes 80 km upstream and 80 km downstream in 3 hours. If the speed of boat in still water is 60 km/h, find the speed of stream in km/h.

Question 6:

A boatman takes 12 hours to cover a distance of 75 km upstream while it takes him only 7.5 hours to cover the same distance downstream . What is the speed of stream ?

Question 7:

The ratio of the speed of the boat downstream to the speed of the boat upstream is 5:4. The time taken by the boat to cover a distance of 60 km upstream is t hours, then how far will the boat travel downstream in t hours?

Question 8:

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 9:

A person rows upstream a distance of $65 \mathrm{~km}$ in 5 hours and rows downstream a distance of $57 \mathrm{~km}$ in 3 hours. How much time will he take to row a distance of $72 \mathrm{~km}$ in still water?

Question 10:

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.