A 750 metres long train crosses a stationary pole in 15 sec. Travelling at the same speed, this train crosses a bridge completely in 25 sec. What is the length of this bridge?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 500
Speed = Distance/Time
When train crosses a pole it ultimately covers it's own length
Speed = 750/15 = 50 m/s
When covering a bridge it takes 25 sec
Therefore distance travelled = 25 x 50 = 1250 m
Length of bridge = 1250 - 750 = 500m