39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 15 persons, working 6 hours a day, complete the work?
Pick one.
A) 10  B) 13  C) 14  D) 26  E) 16
Let the required number of days be x.   Less persons, More days (Indirect Proportion)   More working hours per day, Less days (Indirect Proportion)   Persons	15	:	39	:: 12 : x   Working hours/day	6	:	5   15 x 6 x x = 39 x 5 x 12   x =	(39 x 5 x 12)/(15 x 6)   x = 26.   ANSWER:26
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39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 15 persons, working 6 hours a day, complete the work?