Question

A train running at a speed of 108 km/hr crossed a 170 m long platform in 11 seconds. In how much time will it cross another platform of 110 m?

1) 6 sec.
2) 7 sec.
3) 8 sec.
4) 9 sec.
5) 10 sec.​

Answer 1

Answer:

Let the length of the train be ‘x’ m.

Speed of train = 108 km/hr = 108 × 5/18 = 30 m/sec.

∵ Time taken to cross platform = Sum of lengths of train and platform/Speed of train

⇒ 11 = (x + 170)/30

⇒ x = 330 – 170 = 160

∴ Time taken to cross a 110 m long platform = (160 + 110)/30 = 270/30 = 9 sec

Answer 2

Step-by-step explanation:

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