A train takes 18 seconds to pass completely through a station 162 m long and 15 seconds through another station 120 m long. The length of the train is :	Options:
A) 70 m
B) 80 m
C) 90 m
D) 100 m
E) None
Solution   Let the length of the train be x metres .   ∴ x+162/18 =x+120/15 =15(x+162) =18(x+120) = x=90m   Answer 90 m
<result>C</result>
A train takes 18 seconds to pass completely through a station 162 m long and 15 seconds through another station 120 m long. The length of the train is :