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Basic Maths Data Intensity 1 :: Discussion

17.	A and B can finish a work 30 days if they work together. They worked together for 20 days and then B left. A finished the remaining work in another 20 days. In how many days A alone can finish the work?
	A.	40
	B.	50
	C.	60
	D.	70

	Answer: Option C


	Explanation:
	Amount of work done by A and B in 1 day = 1/30 Amount of work done by A and B in 20 days = 20 × (1/30) = 20/30 = 2/3 Remaining work – 1 – 2/3 = 1/3 A completes 1/3 work in 20 days Amount of work A can do in 1 day = (1/3)/20 = 1/60 => A can complete the work in 60 days



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Published by:Michael Daani

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