An escalator moves towards the top level at the rate of 11 ft.sec and its length is 126 feet. If a person walks on the moving escalator at the rate of 3 feet per second towards the top level, how much time does he take to cover the entire length.	Choose the most appropriate option:
A) 14 sec
B) 10 sec
C) 12 sec
D) 8 sec
E) 9 sec

Rationale: "time taken to cover the entire length = tot . dist / resultant speed = 126 / ( 11 + 3 ) = 9 sec answer : e"
Answer: E