A fill pipe can fill 1/4 of cistern in 16 minutes. In how many minutes, it can fill 3/4 of the cistern?  Choose one:
A) 24min
B) 30min
C) 48min
D) 26min
E) 16min
Required time = 16*4*3/4= 
<gadget id="calculator">16*4*3/4</gadget>
<output>48</output>
48 minutes   Answer is 48min
<result>C</result>
A fill pipe can fill 1/4 of cistern in 16 minutes. In how many minutes, it can fill 3/4 of the cistern?