Question 12

Aman and Ajay can build a wall in 9 days and 12 days respectively. In how many days can they finish the work if they work together?

Solution
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Aman's 1 day work = $$\frac{1}{9}$$

Ajay's 1 day work = $$\frac{1}{12}$$

Both's 1 day work = $$\frac{1}{9}+\frac{1}{12}=\frac{7}{36}$$

So, both can do the work in $$5\frac{1}{7}$$ days.

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