A can do a piece of work in 12 days and B in 24 days. If

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A can do a piece of work in 12 days and B in 24 days. If they work together, in how many days will they finish the work?

1. 12 days
2. 20 days
3. 15 days
4. 8 days

Correct Option: D

(A + B)’s 1 day’s work

=	1	+	1
	12		24

=	2 + 1	=	3	=	1
	24		24		8

∴ Required time = 8 days