Question

X can complete a work in 10 days and y can do in 15 days. if they are hired for 5 days to work together, what is the work that is left unfinished

Answer 1

Here's the answer.

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Answer 2

$x$ can do $\frac{1}{10}$ work in a day.

$y$ can do $\frac{1}{15}$ work in a day

Together$=\frac{1}{10_{\times 3}} +\frac{1}{15_{\times 2}}$  (1 day)

$=\frac{5}{30}$

$=\frac{1}{6}$

They work for 5 days

$\therefore$ completed work$=\frac{1}{6}\times 5$

$=\frac{5}{6}$

$\therefore$ unfinished work$=1-\frac{5}{6}$

$=\frac{5}{6}$

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