Boats & Streams Model Questions Set 1 Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

A steamer goes downstream from one part to another in 4 hours. It covers the same distance upstream in 5 hours. If the speed of stream is 2 km/hr, the distance between the two ports is

a) 68 km

b) 45 km

c) 64 km

d) 80 km

Question : 2

A boat takes 19 hours for travelling downstream from point A to point B and coming back to point C, mid way between A and B. If the velocity of the stream is 4 km/hr and the speed of the boat in still water is 14 km/hr. then the distance between A & B is

a) 180 km

b) 200 km

c) 160 km

d) 190 km

Question : 3

A man rows upstream 24 km and downstream 36 km taking 6 hours each. Find the speed of current.

a) 1.5 km/h

b) 0.5 km/h

c) 1 km/h

d) 2 km/h

Question : 4

If a man’s rate with the current is 12 km/hr. and the rate of the current is 1.5 km/hr, then man’s rate against the current is –

a) 5.25 km/hr

b) 9 km/hr

c) 6.75 km/hr

d) 7.5 km/hr

Question : 5

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

a) 2 : 1

b) 3 : 1

c) 4 : 3

d) 3 : 2

Question : 6

The speed of a boat in still water is 8 km/hr. It can travel 20 km downstream at the same time as it can travel 12 km upstream, the rate of stream (in kmph) is

a) 2.5

b) 0.5

c) 2

d) 2.75