39 persons can repair a road in 12 days, working 10 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?	Choose the correct choice: A) 10 B) 13 C) 14 D) 15 E) 26
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	:	39	:: 12 : x   Working hours/day	6	:	10   30 x 6 x x = 39 x 10 x 12   x =	(39 x 10 x 12)/(30 x 6)   x = 26.   ANSW26R:26
<result>E</result>
39 persons can repair a road in 12 days, working 10 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?