33 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?
Choose one:
A) 10	B) 11	C) 13	D) 18	E) 19
Let the required number of days be x.   Less persons, More days (Indirect Proportion)   More working hours per day, Less days (Indirect Proportion)   Persons 30 : 33 :: 12 : x   Working hours/day 6 : 5   30 x 6 x x = 33 x 5 x 12   x = (33 x 5 x 12)/(30 x 6)   x = 11   ANSWER 11
<result>B</result>
33 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?