Question
Length of a train, whose speed is 72 km/h, is 360 metres.
Find the time taken (in seconds) by train to cross a bridge of length 240 metres.Solution
Speed of train = 72 km/h = 72 × (5/18) = 20 m/s
Required time = (360 + 240) ÷ 20 = 600 ÷ 20 = 30 seconds
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2, 5, 11, 23, 47, 97, 191 9, 10, 12, 18, 42, 160
4, 5, 12, 39, 160, 806
13 74 355 1416 4245
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63, 124, 215, 345, 511, 728
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125, 129, 120, 136, 121, 147
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25, 38, 53, 74, 97, 126
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6, 12, 24, 50, 96, 192