An escalator moves towards the top level at the rate of 8 ft.sec and its length is 160 feet. If a person walks on the moving escalator at the rate of 2 feet per second towards the top level, how much time does he take to cover the entire length. Choices:
A) 14 sec
B) 10 sec
C) 16 sec
D) 8 sec
E) 9 sec
Time taken to cover the entire length = tot.dist/resultant speed   = 160/ (8+2)= 
<gadget id="calculator">160/ (8+2)</gadget>
<output>16</output>
16sec   ANSWER:16 sec
<result>C</result>
An escalator moves towards the top level at the rate of 8 ft.sec and its length is 160 feet. If a person walks on the moving escalator at the rate of 2 feet per second towards the top level, how much time does he take to cover the entire length.