DELHI POLICE MATHS QUIZ

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Question 1:

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 2:

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 3:

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 4:

A boat goes 24 km upstream in 6 hours and travels the same distance downstream in 144 minutes. What is the speed of the current?

Question 5:

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 6:

A boat covers 60 km downstream in 5 hours. If the difference between the downstream and upstream speed of the boat is 4 km/hr, then find the speed of the boat in still water?

Question 7:

A boat takes 40% less time to travel a certain distance in still water than to cover two times of the same distance downstream. If the speed of the boat in still water is 25 km/h, then what is the speed (in km/h) of the stream?

Question 8:

A swimmer can swim at a speed of 12 km/h in still water. If a river is flowing at a speed of 2 km/h, then how much time will the swimmer take to swim 6 km upstream?

Question 9:

A boatman can row his boat in still water at a speed of 9 km/h. He can also row 44 km downstream and 35km upstream in 9 hours. How much time (in hours) will he take to row 33 km downstream and 28km upstream?

Question 10:

A boat can go 10 km upstream and 11 km downstream in a total time of 52 minutes. If the speed of the stream is 5 km/h, then what is the speed (in km/h ) of the boat when going downstream ?