A pipe can fill a cistern in 77 minutes. Find the time in which 1/11 part of the cistern will be filled? Select the correct option: A) 5min B) 2min C) 3min D) 1min E) 7min
Full cistern filled in = 77 minutes   1/11 part filled in = 77*1/11= 
<gadget id="calculator">77*1/11</gadget>
<output>7</output>
7minutes   Answer is 7min
<result>E</result>
A pipe can fill a cistern in 77 minutes. Find the time in which 1/11 part of the cistern will be filled?