[A]. 23 m
[B]. 23 2 m 9
[C]. 27 7 m 9
[D]. 29 m
✅ The correct answer is option C.
Relative speed = (40 – 20) km/hr =
Relative speed = (40 – 20) km/hr =
20 x
5
m/sec =
50
m/sec.
18
9
Length of faster train =
50
x 5
m =
250
m = 27
7
m.
9
9
9