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A train overtakes two persons, cycling at 9 kmph and 18 kmph in 40 seconds and 48 seconds respectively. Find its length and speed.

A.	512 m	B.	600 m
C.	560 m	D.	601 m

Answer and Explanation

Answer:600 m

Explanation:
let the length and the speed of the train be l m
=> And s kmph respectively.
=> l = 40(s – 9)5/18 = 48(s – 18)5/18
=> s-9 / s-18 = 48/40
=> s = 63
l = 40(63 – 9) x 5/18 = 600 m

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