If a 150 m long train crosses a platform, which is 20% longer than the train, in 30 sec, find the speed of the train.?

31.8 km/hr
35.1 km/hr
39.6 km/hr
43.2 km/hr

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 3 : 39.6 km/hr

Length of platform = (100 + 20)% of (length of train) = 1.2 × 150 = 180 m

As we know, Time taken to cross the platform = (sum of lengths of train and platform)/speed of train

⇒ 30 = (150 + 180)/(Speed of train)

∴ Speed of train = 330/30 = 11 m/sec = 11 × (18/5) = 39.6 km/hr

4 views Answered 2022-09-04 04:29

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