Boats and Stream

21 A boatman rows 1 km in 5 min along the stream and 6 km in 1 h against the stream. The speed of the stream is

22 A boat covers 24 km upstream and 36 km downstream in 6 hours, while it covers 36 km upstream and 24 km downstream in 6 i hon rs, Then the velocity of the current is

23 Shantanu can row upstream at 10 km/h and downstream at 18 km/h. Find the man's rate in still water and the rate of the current:

24 In one hour, a boat goes 11 km along the stream and 5 km against the stream. The speed of the boat in still water (in km/hr) is:

25 If a man’s rate with the current is 12 km/h and the rate of current is 1.5 km/h, then the man’s rate against the current in kmfh is

26 A man can row 12 km/h in still water. When the river is running at 2.4 km/h, it takes him 1 h to row to a place and to come back. How far is the place?

27 A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the current respectively?

28 Keshav can row 60 km downstream and 36 km upstream, taking 10 h each time. What is the velocity of the current?

29 A motorboat can travel at 10 km/h in still water. It travelled 91km downstream in a river and then returned to the same place, taking altogether 20 h. The rate of flow of river is

30 The speed of the current is 5 km/h. A motorboat goes 10 km upstream and back again to the starting point in 50 min. The speed, (in km/h) of the motorboat in still water is