Question : A train 180 m long moving at a speed of 20 m/sec overtakes a man moving at a speed of 10 m/sec in the same direction. The train passes the man in:
Option 1: 6 sec
Option 2: 9 sec
Option 3: 18 sec
Option 4: 27 sec
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Correct Answer: 18 sec
Solution :
Distance = length of train = 180 m
Speed of train = 20 m/s
Speed of main = 10 m/s
The direction of both the train and the man is the same.
So, relative speed = 20 - 10 = 10 m/s
Required time = $\frac{180}{10}$ = 18 sec.
Hence, the correct answer is 18 sec.
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