Question

A train 100 meters long-running at 54 km/hr takes 20 seconds to pass a bridge. The length of the bridge is

पर्याय

• 50 mt

• 150 mt

• 200 mt

• 620 mt

Answer 1

200 mt

Explanation:

Speed of train = 54 km/h

or `(54xx5)/18=15` m/s

Distance covered
= Length of a bridge (`l`) + Length of train

= `l`+ 100

Time = 20 second

`(l+100)/15=20` ..........(T = D/S)

`l`= 200 m