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A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?

A. 65 sec

B. 89 sec

C. 100 sec

D. 150 sec

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Correct Answer :

B. 89 sec

S p e e d = (\frac{240}{24}) m / s e c = 10 m / s e c . ∴ R e q u i r e d t i m e = (\frac{240 + 650}{10}) s e c = 89 s e c .

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