Boats & Streams Model Questions Set 1 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 11

A boat takes half the time in moving a certain distance downstream than upstream. The ratio between rate in still water and rate of current is

a) 3 : 1

b) 1 : 4

c) 1 : 2

d) 3 : 2

Question : 12

The speed of a boat in still water is 15 km/h and the rate of stream is 5 km/h. The distance travelled downstream in 24 minutes is

a) 6 km

b) 4 km

c) 8 km

d) 16 km

Question : 13

A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30km upstream and 21 km downstream in 6 hours and 30 minutes. The speed of the boat in still water is :

a) 14 km/h

b) 10 km/h

c) 4 km/h

d) 6km/h

Question : 14

A man swimming in a stream which flows 1.5 km/hr, finds that in a given time he can swim twice as fast with the stream as he can against it. At what rate does he swim ?

a) 6 km/hr

b) 4.5 km/hr

c) 5.25 km/hr

d) None of these

Question : 15

A person can row a boat d km upstream and the same distance downstream in 5 hours 15 mins. Also he can row the boat 2d km upstream in 7 hours. How long will it take to row the same distance 2d km downstream.

a) 8 hours

b) $7{2/3}$hours

c) $7{3/4}$ hours

d) $7/2$ hours