A train covers a distance of 20 km in 20 min.

A train covers a distance of 20 km in 20 min. If it takes 9 sec to pass a telegraph post, then the length of the train is?

Quiz

Answer/Solution

150m

Steps/Work

Speed = (20/20 * 60) km/hr
= (60 * 5/18) m/sec
= 50/3 m/sec.
Length of the train
= 50/3 *9
= 150 m.
Answer: A