In what time will a train 240 metres long cross an electric pole, if its speed be 126 km/hr?  Choose one.
A) 6.75 sec B) 6.85 sec C) 6.55 sec D) 6.44 sec E) 7.85 sec

Rationale: "solution speed = ( 126 x 5 / 18 ) m / sec = 35 m / sec time taken = ( 240 / 35 ) sec = 6.85 sec . answer b"
Answer: B