a train running at 63 km/hr crosses an electric pole in 12 sec and a bridge in 30 sec. Find the length of (a) train and (b) bridge

Question

A train running at 63 km/hr crosses an elecric pole in 12 sec and a bridge in 30 sec. Find the length of (a) train and (b) bridge.

Answer 1

Speed of train = 63 x(5/18) = 35/2 m/*

Time taken to cross electric pole = 12 sec

Time taken to cross bridge = 30 sec

Total time taken = (12 +30) = 42 sec

Now,

a) Length of train = (speed x time)

= ( 35/2 x 42)

= 735 m

Total length of train is 735 m

b) Length of bridge = (speed x time)

= (35/2 x 30)

= 525 m