Question

A train of length 200m traveling at a speed of $30m{s}^{-1}$ overtakes another train of length 300m traveling at a speed of $20m{s}^{-1}$ in the same direction. The time taken by the first train to pass the second train is:

• A. 50 s
• B. 10 s
• C. 20 s
• D. 40 s

Answer 1

The correct option is A 50 s

As both trains are moving in same direction, relative speed is$=30-20=10m/s$.

$Totaldistance=200+300=500m$

Hence time taken $=\frac{500}{10}=50s$