If a train 200 metres long passes a telegraph pole in 18 seconds, then speed of the train and the time in which it pass a bridge 250 m long respectively are

A) 45 km/hr, 44 sec

B) 32 km/hr, 45 sec

C) 40 km/hr, 40.5 sec

D) 40 km/hr, 40 sec

Correct answer:
C) 40 km/hr, 40.5 sec

Description for Correct answer:
v = \( \Large \frac{d}{t} = \frac{200}{18} \times \frac{18}{5} \) = 40 kmph

t = \( \Large \frac{ \left(250+200\right) }{200} \times 18 \) = 40.5 sec.

Please provide the error details in above question

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