Two trains A and B start from Delhi and Patna toward Patna and Delhi, respectively. After passing each other, they take 16 h and 9 h to reach Patna and Delhi, respectively. If the train from Delhi is moving at 90 km/h, then find the speed of the other train (in km/h) .?
Correct Answer: 120
Explanation:
Given t1 = 16 h , t2 = 9 h and a = 90 km/h
According to the question
∴ Speed of B = a√t1/ t2
= 90 x √16/9
= 90 x 4/3
= 30 x 4 = 120 km/h
