-14.11eaThe length of a train is 140 m and its speed is 72 km/h. How l

1.	-14.11eaThe length of a train is 140 m and its speed is 72 km/h. How long will it take tocross (i) a pole and (ii) a platform 220 m long?5
Answer» Length of train = 140 m Speed of train = 72 km/hr = 725/18 = 20 m/sec 1) Time train take to cross poleDistance = speed time140 = 20 * timetime = 140/20 = 7 sec 2) Time train take to cross platformDistance = speed time140 + 220 = 20 time360 = 20*timetime = 360/20 = 18 sec

-14.11eaThe length of a train is 140 m and its speed is 72 km/h. How long will it take tocross (i) a pole and (ii) a platform 220 m long?5

Answer»

Length of train = 140 m Speed of train = 72 km/hr = 72*5/18 = 20 m/sec

1) Time train take to cross poleDistance = speed *time140 = 20 * timetime = 140/20 = 7 sec

2) Time train take to cross platformDistance = speed *time140 + 220 = 20 * time360 = 20*timetime = 360/20 = 18 sec