A pipe can fill a cistern in 66 minutes. Find the time in which 1/11 part of the cistern will be filled?	Choices
A) 5 min	B) 2 min	C) 6 min	D) 1 min	E) 10 min

Rationale: "full cistern filled in = 66 minutes 1 / 11 part filled in = 66 * 1 / 11 = 6 minutes answer is c"
Answer: C