How many seconds will a 468 m long train take to cross a man driving his motor bike at a speed of 39 km/hr in a direction of the moving train if the speed of the train is 120 km/hr?

How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?

The speed of the motor boat in still water is 25/3 m/s. It goes 75 km downstream and comes back in 9 hours. Find the speed of the current in km/hr.

A 150 meters long train takes 10 seconds to cross Atul walking at 5 kmph in a direction opposite to that of the train. Find the speed of the train.