A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in :

[A].	8 days
[B].	10 days
[C].	12 days
[D].	15 days

Answer: Option C

Explanation:

(A + B)'s 1 day's work =		1	+	1		=	1	.
		15		10			6

Work done by A and B in 2 days =		1	x 2		=	1	.
		6				3

Remaining work =		1 -	1		=	2	.
			3			3

Now,	1	work is done by A in 1 day.
	15

	2	work will be done by a in		15 x	2		= 10 days.
	3				3

Hence, the total time taken = (10 + 2) = 12 days.

Aptitude :: Time and Work : More Exercises

Time and Work - General Questions

A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in :

Aptitude :: Time and Work : More Exercises

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