P can complete 1/4 of a work in 10 days, Q can complete

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P can complete 1/4 of a work in 10 days, Q can complete 40% of the same work in 15 days, R, completes 1/3 of the work in 13 days and S, 1/6 of the work in 7 days. Who will be able to complete the work first ?

Time taken by P in completing 1 work = 10 × 4 = 40 days
Time taken by Q in completing 1 work

=	15 × 5	=	75	days
	2		2

Time taken by R in completing 1
work = 13 × 3 = 39 days
Time taken by S in completing 1
work = 7 × 6 = 42 days
Clearly, Q took the least time i.e.

	75	or 37	1	days
	2		2