Question

A train is running at the rate of
40 km/hr. A man is also going in the
same direction parallel to the train at
the speed of 25 kmph. If the train
crosses the man in 48 seconds, the
length of the train is
(A) 120 mt.
(B) 180 mt.
(C) 200 mt.
(D) 250 mt.​

Answer 1

Step-by-step explanation:

Let length of train = x km

Then, Speed relative to man =(40-25)=15 km/hr

According to question,

$\frac{x}{15} = \frac{48}{60 \times 60 }$

$x = \frac{1}{5} x$

$\\ \frac{1}{5} \times 1000 = 200$

∴ The length of the train=200m