Question 1013641
Two trains are moving in opposite directions at the speed of 50km/hr and 70km/hr. Their lengths are 150m and 100m. The time required for their crossing each other is?
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Their speeds are added when going in opposite directions = 120 km/hr
"crossing" is the sum of the lengths = 250 m = 0.25 km
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d = r*t
t = d/r = 0.25/120 hours