A train takes 15 sec to cross a tree at the speed of 72 km/hr. The length of the train is:

200 m 300 m 150 m 180 m

300 m

Speed of train = 72 km/hr or 72 × \(\frac{5}{18}\) m/sec = 20 m/sec Distance travel to cross the tree = 20 × 15 = 300 m Hence, length of train = distance traveled by train = 300 m