Q.
A. 45 km/hr
B. 50 km/hr
C. 54 km/hr
D. 55 km/hr
E. None of the above
Correct choice: B
Explanation:
= 45 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.
x - 5 = 45 x = 50 km/hr.