If the train's speed is 63 km/hr, how long will it take a 500 metre long train to cross a man walking at 3 km/hr in the direction of the moving train?
A. 25
B. 30
C. 40
D. 45
Answer:B
If the train's speed is 63 km/hr, how long will it take a 500 metre long train to cross a man walking at 3 km/hr in the direction of the moving train?
A. 25 B. 30 C. 40 D. 45
Explanation: The train's speed in relation to the man is (63 - 3) km/hr = 60 km/hr = (60 x 5/18 ) m/sec = ( 50/3 ) m/sec.As a result, the time it takes to pass the man is ( 500 x 3/50 ) seconds = 30 seconds.