Ratio between speed of boat in still water to speed of stream is 5 : 2. If 224 km is travelled by downstream in 4 hours then find the difference between speed of boat in still water and speed of stream?

• 24 kmph

• 22 kmph

• 28 kmph

• 26 kmph

If the upstream speed of a boat is 50% less than the downstream speed of the boat and if a object is thrown in the river it covers 100m in 50 sec, then how much distance boat can cover in still water in 5 hours?

• 900 m

• 100 m

• 120 m

• 108 m

A steamer can go 12 km in still water in 25 minutes. One day, it went 11.25 km upstream and returned the same distance in downstream. If the difference between the time taken to travel upstream and downstream was 12.5 minutes, then what was the speed of stream in km per hour?

• 7.2

• 5.4

• 6.3

• 4.5

The ratio of speed of A and B in still water is 3 : 2. A and B start from the same point in the river, A goes upstream and B goes downstream. After 3 hours the stream stops flowing and A starts rowing in the opposite direction to meet B. How much time after the stream stops flowing does A meet B?

• 16 hr

• 15 hr

• 12 hr

• 18 hr

A boat goes a certain distance upstream and comes back downstream to the starting point in 144 min. If the speed of the boat in still water becomes 66.67% of the original, time taken for the same journey will be 224 min. What is the ratio of the speed of boat in still water and speed of current?

• 7:1

• 6:1

• 5:3

• 7:2

The speed of current is 5 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if one third of the distance covered going downstream in a certain time is equal to the distance covered going upstream in the same time.

• 15 kmph, 5 kmph

• 20 kmph, 10kmph

• 18 kmph, 8 kmph

• 24 kmph, 14 kmph

There are 3 points P, Q and R in a straight line, such that point Q is equidistant from points P and R. A man can swim from point P to R downstream in 24 hours and from Q to P upstream in 16 hours. Find the ratio of speed of man in still water to speed of stream?

• 5 : 1

• 6:1

• 5:3

• 7:1

Rohit can row a boat 65Km upstream and 130Km downstream in 23 hours, whereas he can swim 45Km upstream and 104Km downstream in 17 hours. Find the speed of boat in still water and the speed of stream.

• 4km/h, 9km/h

• 8km/h, 5km/h

• 9km/h, 4km/h

• 5km/h, 8km/h

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

• 2

• 3

• 4

• 5

A man can row upstream 10 kmph and downstream 20 kmph. Find the man rate in still water and rate of the stream.

• 0,5

• 5,5

• 15,5

• 10,5