A boat takes 1/3rd time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of current is.

Downstream speed = x+y Upstream speed = x-y Speed = distance/time ∴ x+y = D/T .................... (i) x-y = D/3T .................... (ii) From (i) & (ii) 2x = D/T + D/3T 2x = (3D+D)/3T = 4D/3T x = 2D/3T and; y = D/T - 2D/3T = D/3T x/y = 2D/3T × 3T/D x/y = 2

- The speed of a boat is that of the current of water is 35:6. The boat goes along with the current in 5 hours 10 minutes. Approximately at what time it will come back.
- The speed of current is 8 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if one fifth of the distance covered going downstream in a certain time is equal to the distance covered going upstream in the same time?
- The speed of the stream is 11 km/h. Boat ‘A’ covers 84 km distance against the stream in 6 hours and boat ‘B’ covers 90 km distance against the stream in 3 hours. The speed of boat ‘B’ in still water is how much percent of the speed of boat ‘A’ in still water?
- The speed of a boat in still water is 32km/hr and the speed of the current is 8km/hr. It takes a total of 15hours to row to upstream from Point A to B and downstream from Point B to C. If the distance between A to C is two-fifth the distance between B and C then what is the distance between B and C? (Where BC < AB)
- A boat takes 1/12th time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current is
- A man can row his boat with the stream at 42 km/h and against the stream in 7 km/hours. The man’s rate is
- Speed of a boat in still water is 10 kmph and speed of stream is 8 kmph. A man rows to a place at a distance of 54 km and come back to starting point. The total time taken by him is:
- A man can row at 4 kmph in still water. If the velocity of current is 3 kmph and it takes him 8 hour to row to a place and come back, how far is the place?
- The speed of the stream is 14 km/h. Boat ‘A’ covers 64 km distance against the stream in 4 hours and boat ‘B’ covers 95 km distance against the stream in 5 hours. The speed of boat ‘B’ in still water is how much percent of the speed of boat ‘A’ in still water?
- Find the total distance covered by boat in each upstream and downstream in 6 hours if the speed of boat in still water and speed of current is 18 km/h and 5 km/h respectively?

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