DELHI POLICE CONSTABLE (BOAT AND STREAM) QUANT QUIZ-5

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Question 1:

Speed of a boat in still water is $12 \mathrm{kmph}$ and that of the current is $3 \mathrm{kmph}$. A man rows a boat upstream up to $135 \mathrm{~km}$ and returns downstream to the starting point. Find the total time taken for the entire journey in hours.

Question 2:

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 3:

Speed of boat in still water is $21 \mathrm{kmph}$ & speed of current is $3 \mathrm{kmph}$. The boat completes round trip from A to B & then back to A in $7 \mathrm{hrs}$. Find the distance between A & B.

Question 4:

A motor-boat can travel at $10 \mathrm{~km} / \mathrm{h}$ in still water. It travelled $91 \mathrm{km}$ downstream in a river and then return to the same place, taking altogether 20 hours. Find the rate of flow of river.

Question 5:

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 6:

If the speed of stream is 20% of the speed of boat in still water and it covers 120km upstream in 150 minutes , then what is the downstream speed of boat ?

Question 7:

Speed of a boat in still water is $8 \mathrm{~km} / \mathrm{h}$ and speed of stream is $4 \mathrm{~km} / \mathrm{h}$. Find time taken by boat to cover $30 \mathrm{~km}$ going downstream and returning in opposite direction.

Question 8:

The speed of a boat in still water is $18 \mathrm{~km/h}$ and the speed of the stream is $3 \mathrm{km/h}$. Suresh rows to a place at a distance of $105 \mathrm{~km}$ and comes back to the starting point. The total time taken by him is:

Question 9:

A man covers a certain distance in Downstream and come back to starting point in Upstream and takes total 32 hours . If speed of man in still water is 8 km/h and speed of current is 5 km/h then find the distance between both point .

Question 10:

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 ?