A train travelling 80kmph to pass through a tunnel of 70km at 5:12am. the train leaves the tunnel at 5:18am. find the length of train?
Choose the correct choice.
A) 1 B) 2 C) 3 D) 4 E) 5

Rationale: distance = speed * time let x is length of train 5 : 18 - 5 : 12 = 6 minutes = 6 / 60 hr = 1 / 10 hr now d = ( x + 7 ) = 80 kmph * 1 / 10 x = 1 km answer : a
Answer: A