A train takes 18 seconds to pass completely through a statin 162 m long and 15 seconds through another station 120 m long. The length of the train is:
Choose the correct choice from the following answers.
A) 30	B) 60	C) 90	D) 100	E) 120
Sol.   Let the length of the train be x metres.   ∴ x + 162 / 18 = x + 120 / 15 ⇔ 15 (x + 162) = 18 (x + 120) ⇔ x = 90 m.   Answer 90
<result>C</result>
A train takes 18 seconds to pass completely through a statin 162 m long and 15 seconds through another station 120 m long. The length of the train is: