Practicing Success
A 150 meter train takes 10 sec to cross a man who is walking in the same direction at the speed of 6 km/hr. The speed of the train is: |
52 km/hr 55 km/hr 64 km/hr 60 km/hr |
60 km/hr |
Let the speed of the train be x km/hr The relative speed of the train with respect to the man = (x - 6) km/hr ⇒ (x - 6) = \(\frac{150}{10}\) × \(\frac{18}{5}\) (converting m/s to km/hr by multiplying with x\(\frac{18}{5}\)) ⇒ (x - 6) = 15 × \(\frac{18}{5}\) ⇒ x - 6 = 54 x = 60 Ans = 60km/hr |