A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in:

1.

A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in:

[A].	5 days
[B].	6 days
[C].	10 days
[D].	10 1/2 days

Answer: Option C

Explanation:

(B + C)'s 1 day's work =		1	+	1		=	7	.
		9		12			36

Work done by B and C in 3 days =		7	x 3		=	7	.
		36				12

Remaining work =		1 -	7		=	5	.
			12			12

Now,	1	work is done by A in 1 day.
	24

So,	5	work is done by A in		24 x	5		= 10 days.
	12				12

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