Two boat A and B 20 km apart as shown. Boat a streaming east and boat B in north by `30 km//hr` then find shortest approach and time taken for it.

The ratio of the speed of a boat in still water and the speed of the stream is 5:1. If the speed of travelling downstream is 24 km/hr, then find the time taken by boat to cover 48 km while moving upstream

A sailor in river takes a boat from place A to place B, and returns to A. place A and B are 21 km apart. And he takes 10 hours to go and return. The time taken by the boat to row 7 km downstream is equal to the time taken by the boat to row 3 km upstream. Then what is the speed of the current?

If the speed of a boat in still water is 8 km/h and the rate of stream is 4 km/h, then find upstream speed of the boat.

A boat can go 20 km upstream and 30 km downstream in 3 hours. It can go 20 km downstream and 10 km .upstream in 1 2/3 hrs. Find the speed of the boat in still water and speed of stream.

What will be speed of stream, if speed of boat in still water is 45km/hr? A. The time taken by boat to cover 240 km upstream is 4 hours more than time taken by boat to cover same distance in downstream. B. Boat takes total 15 hours to cover 300 km in downstream and upstream.

Downstream speed of boat is 50 km/h and upstream speed of boat is 30 km/h. Find the speed of boat in still water and speed of stream?

A boat travels 2 km upstream in a stream flowing at 3 km/hr and then returns downstream to the starting point in 30 minutes. The speed of the boat in still water is: