A) 20 km/h |
B) 80 km/h |
C) 15 km/h |
D) 11 km/h |
A) 20 km/h |
Relative speed of train
= \( \Large \frac{400}{36} m/s = \frac{400}{36} \times \frac{18}{5} \) =40 km/h
Relative Speed of train = Speed of train + Speed of man
=> 40 = Speed of train + 20
Therefore, Speed of train = 40 - 20 = 20 km/h