Question

A train is moving at a speed of 132 km/h .if the length of the train is 110 metres,how long will it take to cross a railway platform, 165 metres long​

Answer 1

Hey there!

• Speed = 132  km/hr  = 132 x 5/18  = 110/3 m/s

• We know that :

         speed = distance/time

         ∴ time= distance /speed

• Now , in such cases relative distance is considered . hence, the relative distance is : (110+165)m

• Let us now substitute the values :

          =   $\frac{110+165}{\frac{110}{3}}$

          =   $\frac{3(275)}{110}$

          = 7.5 seconds

Hope it helps !