Two trains are moving in opposite directions at speeds of 60 km/h and 70 km/h. The length of one train is 170 m. The time taken by them to cross each other is 26 seconds. The length (in m) of the other train, correct to 2 decimal places, is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 768.88
⇒ Speed of trains: 60 km/h
= 50/3 m/s, 70 km/h
= 175/9 m/s
⇒ Relative speed = 50/3 + 175/9 = 325/9 m/s
⇒ Distance = 325/9 × 26
= 8450 ÷ 9 = 938.888… m
⇒ Length of other train = 938.888… − 170 = 768.888…