Question : Two trains are moving in the opposite direction at the speed of 48 km/hr and 60 km/hr respectively. The time taken by the slower train to cross a man sitting in the faster train is 12 seconds. What is the length of the slower train?
Option 1: 480 m
Option 2: 720 m
Option 3: 180 m
Option 4: 360 m
Correct Answer: 360 m
Solution :
Relative speed = 48 + 60 = 108 km/hr = 108 × $\frac{5}{18}$ = 30 m/s
Time taken = 12s
So, the length of the smaller train = 30 × 12 = 360 m
Hence, the correct answer is 360 m.
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