A pipe can fill a cistern in 33 minutes. Find the time in which 1/11 part of the cistern will be filled?  Pick one
A) 5 min  B) 2 min  C) 3 min  D) 1 min  E) 10 min

Rationale: "full cistern filled in = 33 minutes 1 / 11 part filled in = 33 * 1 / 11 = 3 minutes answer is c"
Answer: C