A 130-meter-long train travelling at a speed of 45 km/hour crosses a bridge in 30 seconds. What is the length of the bridge?

A) 255 m

B) 200 m

C) 245 m

D) 240 m

Length of train =L1  = 130 m
Speed = 45 km/h = ( 45 x 5/18) = 75/6 m/s
Time = 30 sec
Length of Bridge = L2 =?
We know that:
 
Speed = Length/ Time = (L1 + L2)/ Time
75/6 = (130 + L2) / 30
 By solving this we get
L2 = 245 m

 

Related MCQs:
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  3. A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?
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