Question

A train 110m long is moving with a velocity of 72 km/h . find the time it takes to cross the bridge 1 km long?

Answer 1

velocity = V = 72km/h = 72×10³m/36×10²s = 2×10¹m/s

length of bridge = d1 = 1km = 1000m

length of train = d2 = 110m

total distance traveled by train = d1+d2 = 1000m+110m = 1110m

time = t = ?
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V = d/t

t = d/V

t = 1110m/2×10¹ m/s

t = 1110/200 s

t = 5.55 s
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so train take 5.55s to cross the bridge