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Ayesha can complete a piece of work in 16 days. Amita can complete the same piece of work in 8 days. If both of them work together in how many days can they complete the same piece of work ?

Correct Answer: $${\text{5}}\frac{1}{3}{\text{ days}}$$
Ayesha's 1 day's work $$ = \frac{1}{{16}}$$
Amita's 1 day's work $$ = \frac{1}{{8}}$$
(Ayesha + Amitha)'s 1 day's work
$$\eqalign{ & = {\frac{1}{{16}} + \frac{1}{8}} \cr & = \frac{3}{{16}} \cr} $$
∴ Both together can complete the work in
$$\eqalign{ & = \frac{{16}}{3} \cr & = 5\frac{1}{3}{\text{ days}} \cr} $$

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