### Prateek Asked :

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Q. A train overtakes two persons who are walking in the same direction in which the train is going, at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. The length of the train is:

A. 45 m

B. 50 m

C. 54 m

D. 72 m

Nasreen Laskar

Commented on 2021-05-24

Ans: (B)

Let, speed of train=x km/h

A/Q,

(x-2)*9/3600=(x-4)*10/3600

=> X=22 km/h

Hence, length of train

=(x-2)*9/3600 km

=20*9/3600 km

=1/20 km

=1000/20 m

=50 m

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