Question
Train 'P' travels at a speed of 45 km/h and crosses
train 'Q' in 15 seconds while moving in opposite directions. Determine the speed of train 'Q' if the lengths of trains 'P' and 'Q' are 120 m and 150 m, respectively.Solution
ATQ,
Let the speed of train Q = x km/h According to the question, (45 + x) × 5/18 = (120 + 150)/15 (45 + x) × 5/18 = 18 45 + x = 64.8 x = 19.8 km/h
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