If the velocity of the stream is 2 km/hr, then the time taken by Ratanmajhi to cover 21 km in downstream and upstream is 10 hours.Hence find the required quadratic equation.

If the speed of the stream is a km/hr, then the time taken by Prosantamajhi to cover d km in downstream and upstream is t hours.

A boat covers 36 km downstream in 4 hours and 18 km upstream in 6 hours. Find the speed of boat.

Speed of the stream is 3 km/hr and the upstream speed is 7 km/hr. Find the time taken by boat to cover 91 km downstream.

A man can swim 3 km/hr in still water. If the velocity of the stream be 2 km/hr, the time taken by him to swim to a place 10km upstream and back is:

The speed of a motor boat is 20 km/hr. For covering the distance of 15 km the boat took 1 hour more for upstream than downstream. Which is the correct quadratic equation for the speed of the current ?

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.