• Numerical Ability - Time, Speed & Distance
Question

A train passes a 50 m long platform in 14 s and a man standing on a platform in 10 s. The speed of the train is

  • A) 24 km/h
  • B) 26 km/h
  • C) 40 km/h
  • D) 45 km/h
  • E) None of these
Solution

(d); Let speed of train be m/s and length of the train be 1 m

x = 50 + 1/15 

and x = 1/10 --->1 = 10x

x = 50 + 10x/14

14x = 50 + 10x

x = 50/4 m/s

   = 50/4 X 18/5

   = 45 km/h

(d); Let speed of train be m/s and length of the train be 1 m

x = 50 + 1/15 

and x = 1/10 --->1 = 10x

x = 50 + 10x/14

14x = 50 + 10x

x = 50/4 m/s

   = 50/4 X 18/5

   = 45 km/h
Comments