The water in a river flows at a speed of `1.5kmph` and a boatman, who can row his boat at a speed of `2.5kmph` in still water, takes `7(1)/(2)` hours to go half distance upstream and then return to the starting point, the total distance covered by the boatman is

Swati can row her boat at a speed of 5km/hr in still water.if it takes her 1 hour more to row the boat 5.25km upstream than to return downstream,Find the speed of the stream.

A river 2 km wide is flowing at the rate of 2km/hr. A boatman, can row the boat at a speed of 4 km/hr in still water, goes a distance of 2 km upstream and them comes back. The time taken by him to complete his journey is

The river flows at 4 km/h. A boat can go downstream thrice as fast as upstream The speed of boat in still water is

A river is flowing with a steady speed of 4km/h. One rows his boat down stream in the river and then returns by rowing upstream in the same river.When he returns to the starting point ,the total distance covered by him is 42km.If the return journey takes 2 h more than his outward journey, then the speed of his rowing in still water must be

The speed of a boat in still water is 42 km/hr .It covers a distance of 30 km upstream in 1 hour .What is the speed (in km/hr) of the stream ?

A boat travels with a speed of 15km/hr in still water.If a river flowing at 5km/hr ,the boat travels some distance downstream and then returns.The ratio of average speed to the speed in still water is

A man can row at a speed of 10 km/hr in still water to a certain upstream point and back to the starting point in a river which flows at 4 km/hr. Find his average speed for total journey.

What is the speed of the boat in still water? I. It takes 2 hours to cover the distance between A and B downstream.II.It takes 4 hours to cover the distance between A and B upstream.