**How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 krn/hr in the direction of the moving train if the speed of the train is 63 km/hr ?**

A. 25

B. 30

C. 40

D. 45

**Solution**

Speed of train relatively to man = ( 63 – 3)km/hr

= 60 km /hr

= (60 x 5 / 18)m/sec

= (50 /3) m/sec

Time taken to pass the man = (500 x 3 / 50)sec

= 30 sec.

**Answer : **B

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