Question

a trin a train 250 m long passes a man running at 10km/hr in the opposite direction in which the train is going in 10 sec. what is the speed of the train in km/hr

Answer 1

we can assume the speed of train as x

Now do the conversion of speed of man in meter per second.

use the formula;

=Length of train/Speed of train - Speed of man (since are in same directrion)

Then put the value and solve as done in image and get the answer.