Question
A train 'B' speeding with 100 kmph crosses another train
C, running in the same direction, in 2 mins. If the length of the train B and C be 150m and 250m respectively, what is the speed of the train C (in km/ph) ?Solution
Given, speed of train B = 100 km/ph Let speed of train C = x km/ph length of train B = 150 m = 0.15 km length of train C = 250 m = 0.25 km time taken = 2 minutes = 2/60 = 1/30 time taken = (length train A + length train B)/( difference i n speed) = 0.4 / (100−x) 1/30 = 0.4 / (100−x) 100 − x = 0.4 × 30 100 − 12 = x X (speed of the train C) = 88 km/ph
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