how many seconds will a 500 meter long train moving with a speed of 63 km/hr, take to cross a man walking with a speed of 3 km/hr in the direction of the train? a.42
Answers
Given,
Speed of train = 63km/hr.
Speed of man = 3km/hr
Now, Since both objects are moving, so we need to find relative speed . Relative speed of train with respect to man will be treated as the only one of them object is moving in direction of train. Moreover Relative veolocity can also be explained as man is in rest while train is moving.
Relative velocity of train with respect to man = 63 - 6 = 60 km/hr = 50/3 meter per/second
Now,
Train have to travel 500 meter distance with respect to man
Hence,
Time taken to cross the man = distance/speed
= 500/(50/3)
= (500*3)/50
= 30 seconds