49 pumps can empty a reservoir in 13/2 days, Working 8 hours a day. If 196 pumps are used for 5 hours each day, then the same work will be completed in:
Select the correct option:
A) 2 days	B) 5/2 days	C) 13/5 days	D) 3 days	E) None of these
Explanation :   Let the required number of days be x. Then,   More pumps, Less days (Indirect Proportion)   Less working hrs / day, More days (Indirect Proportion)   Pumps 196 : 49   Working Hrs / Day 5 : 8 :: 13/2 : x   96 x 5 x x = 49 x 8 x 13/2   x = 49 x 8 x 13/2 x 1 / (196 x 5)   x = 13/5   Answer 13/5 days
<result>C</result>
49 pumps can empty a reservoir in 13/2 days, Working 8 hours a day. If 196 pumps are used for 5 hours each day, then the same work will be completed in: