Two trains, which are moving along different tracks in opposite directions towards each other, are put on the same track by mistake. Their drivers, on noticing the mistake, start slowing down the trains when the trains are 300 m apart. Graphs given below show their velocities as function of time as the trains slow down. The separation between the trains after both have stopped, is:

Options

A. 120 m
B. 280 m
C. 60 m
D. 20 m

Answer

D

Explanation

Find area of both graphs and subtract from 300 m.