A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?	Choices.
A) 65  B) 80  C) 85  D) 82  E) 89

Rationale: speed = ( 240 / 24 ) m / sec = 10 m / sec . therefore , required time = ( 240 + 650 ) / 10 sec = 89 sec . answer is e .
Answer: E