Basic Maths Data Intensity 3 Questions and Answers Discussion Page.

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Basic Maths Data Intensity 3 :: Discussion

15.	A alone can finish a work in X days. B alone can finish the same work in X+5 days. Together, they take 6 days to complete the work. Find X?
	A.	9
	B.	10
	C.	11
	D.	12

	Answer: Option D


	Explanation:
	Part of work completed by A in a day = 1/X Part of work completed by B in a day = 1/(X+5) (1/X)+(1/(X+5)) = 1/6 (2X+5)/(X²+5X) = 1/6 X²+5X = 6(2X+5) X²-7X-30 =0 Solving, X=10



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Published by:Michael Daani

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