Question

Q.9 A and B together can dig a pond in 20 days. They worked together for
8 days and then B leaves the work. How long will A take to finish the work,
if A alone can dig the pond in 30 days?​

Answer 1

Answer:

366

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Answer 2

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➡A and B together can dig a pond in 30 days

➡A & B 1 day work =

$\implies\frac{1}{30}$

➡They worked together for 12 days

➡work done in 12 Day

$\implies\frac{12}{30} = \frac{2}{5}$

Remaining work =

$\implies 1 - \frac{2}{5} = \frac{3}{5}$

➡A alone can dig the pond in 40 days

➡A's 1 day work =

$\implies\frac{1}{40}$

➡A will take further days

$\implies \frac{3}{5} \div \frac{1}{40}$

$\implies \mathtt{24 \: days}$