A train 100 meters long passes a platform 100 meters long in 10 seconds. The speed of the train is

A) 36 km/hr

B) 45 km/hr

C) 63 km/hr

D) 72 km/hr

Correct answer:
D) 72 km/hr

Description for Correct answer:

The train travels 200 m in 10 seconds

or \( \Large \frac{200}{1000}km \ in \frac{10}{60 \times 60} hours \)

Therefore, Speed of train = \( \Large \frac{200}{1000} \times \frac{60 \times 60}{10} \) = 72 km/hr



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