Question
A 640-metre long train takes 16 seconds to cross a pole.
If it takes 40 seconds to cross a bridge, then find the length of the bridge. (in km)Solution
Speed of the train = (640 / 16) = 40 m/s
Distance covered by the train in 40 seconds = 40 × 40 = 1,600 metres
Length of the bridge = 1,600 640 = 960 metres = (960 / 1000) = 0.96 km
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