3
Q:
A) 105 mts | B) 115 mts |
C) 120 mts | D) 140 mts |
Answer: D) 140 mts
Explanation:
Explanation:
Speeds of two trains = 30 kmph and 58 kmph
=> Relative speed = 58 - 30 = 28 kmph = 28 x 5/18 m/s = 70/9 m/s
Given a man takes time to cross length of faster train = 18 sec
Now, required Length of faster train = speed x time = 70/9 x 18 = 140 mts.