Multiple Choice Questions

39 persons can repair a road in 12 days working 5 hours a day In how many days will 30 persons worki...........

Quantitative Aptitude (CCS) Time and work

39 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?

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	:	5		:: 12 : x

30 x 6 x x = 39 x 5 x 12

x =	(39 x 5 x 12)/
	(30 x 6)

x = 13.

Hence, option 2 is the correct answer.

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