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Basic Maths Data Intensity 2 :: Discussion

17.	P can lay railway track between two stations in 16 days. Q can do the same job in 12 days. With the help of R, they completes the job in 4 days. How much days does it take for R alone to complete the work?
	A.	9(3/5) days
	B.	9(1/5) days
	C.	9(2/5) days
	D.	10 days

	Answer: Option A


	Explanation:
	Amount of work P can do in 1 day = 1/16 Amount of work Q can do in 1 day = 1/12 Amount of work P, Q and R can together do in 1 day = 1/4 Amount of work R can do in 1 day = 1/4 – (1/16 + 1/12) = 3/16 – 1/12 = 5/48 => Hence R can do the job on 48/5 days = 9 (3/5) days



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Published by:Michael Daani

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