Question

08. A train is running at the rate of 50 kmph Aman is also going in the same
direction on the track parallel to the rate at night the train
crosses the man in 42 the length of the train is​

Answer 1

Answer:

Step-by-step explanation:

Let length of train is L

speed of train = 60kmph = 50 × 5/18 = 50/3 m/s

speed of man = 45kmph = 45 × 5/18 = 25/2 m/s

a/c to question, both train and man are going same direction.

so, relative speed of train with Respect to man = 50/3 m/s - 25/2 m/s

= (25/6) m/s

train crosses man in 48 second

so, length of train = relative speed of train with respect to man × time taken

= 25/6 × 48 = 25 × 8 = 200m

hence, length of train is 200m

Answer 2

Car A moves for 2 hours @ 25kmph ---------> d = s X t -------> 50 = 25 X 2

Car B moves for 3 hours @ 25kmph ---------> d = s X t --------> 75 = 25 X 3

Here (tA / tB) = (dA / dB) -----> time ratio = distance ratio = 2 : 3