A train 100 meter in length in length passes a milestone in 10 seconds and another train of the same length travelling in opposite direction in 8 seconds. The speed of the second train is?
Correct Answer: 54 kmph
Explanation:
Speed of first train = (100/10) = 10 m/sec.
Let the speed of second train be x m/sec
∴ 200/ 10 + x = 8
⇒ 200 = 80 + 8x
⇒ x = 15
∴ Speed of second train = 15 m/sec
= (15 x 18/5)
= 54 km/hr.
