Answer : 1 7.71 sec Explanation : Answer: A) 7.71 sec Explanation: Given L1 = 140 mL2 = 160 mS1 = 60 km/hrS2 = 80 km/hrFrom the question we get,S1 S2 = (L1 L2) / T=

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The length of two superfast trains are 140 mts and 160 mts respectively. If they run at the speed of 60 km/hr and 80 km/hr respectively in opposite direction, find the time in which they will cross each other ?