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A 150 m long train crosses a pillar in 15 seconds and a train equal in length coming from its opposite direction in 12 seconds. The speed of the second train is: a.) 45km/hr b.) 48km/hr c.) 52km/hr d.) 54km/hr |
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Answer» As length of both trains are equal, `:.` Length of the second train ` = 150m` Time taken by second train to cross pillar ` = 12` sec `:.` Speed of second train `= 150/12` m/sec `= 12.5` m/sec Speed of train in km/hour `= 12.5**3600/1000 = 45` km/hour So, option `a` is the correct option. |
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