A train travelling at a speed of 72 km/hr passes an electric pole in 3 – McqOptions

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1.	A train travelling at a speed of 72 km/hr passes an electric pole in 30 seconds. Find the time taken by it to cross a bridge of length 900 m (in seconds).
A.	70
B.	80
C.	75
D.	85
E.	None of these
Answer» D. 85

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