WBCS.LIVE practice question

A 250 metre long cargo train speed is 33 km/hr. A 200 metre long mail train is moving on a parallel track in the same direction with a speed of 60 km/hr which chases the cargo train and leaves back the cargo train after some time. In how much time (in minute) the mail train left back the cargo train completely?

Solve this multiple-choice question and check the correct answer with its explanation below.