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.  Options: A) 14 sec B) 10 sec C) 12 sec D) 8 sec E) 9 sec
Time taken to cover the entire length = tot.dist/resultant speed   = 126/ (11+3)= 
<gadget id="calculator">126/ (11+3)</gadget>
<output>9</output>
9 sec   ANSW9 secR:9 sec
<result>E</result>
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.