A 175 m long train crosses a platform twice its length in 27 seconds. What is the speed (in km/h) of the train?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 70.
Length of train = 175 m
Length of platform = 2 × 175 = 350 m
Speed = = = m/sec
⇒ × = 35 × 2 = 70 km/hr