Question

A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?

• A. 40 sec
• B. 42 sec
• C. 45 sec
• D. 48 sec
• E. 50 sec

Answer 1

The correct option is A

40 sec

Speed = $(45\times \frac{5}{18})m/sec=\frac{25}{2}m/sec$

Total distance covered = (360+140) m = 500 m.

$\therefore$Required time= $500\times \frac{2}{25}$sec = 40 sec.