Discussion Forum

How long does a train 110 metres long running at the speed of 72 km/hr take to cross a bridge 132 metres in length ?

Answer:

Explanation:

Speed $=\left(72\times\frac{5}{18}\right)$ m/sec $=20$ m/sec.

Total distance covered $=(110+132)$ m $=242$ m.

$\therefore$ Required time $=\left(\frac{242}{20}\right)$ sec = 12.1 sec.