A fill pipe can fill 1/2 of cistern in 10 minutes. In how many minutes, it can fill 1/2 of the cistern? Choose the correct choice from the following choices.
A) 1 min
B) 4 min
C) 6 min
D) 10 min
E) 25min
Required time = 10*2*1/2= 
<gadget id="calculator">10*2*1/2</gadget>
<output>10</output>
10 minutes   Answer is 10 min
<result>D</result>
A fill pipe can fill 1/2 of cistern in 10 minutes. In how many minutes, it can fill 1/2 of the cistern?