Adya and Ashley complete a work separately in 20 and 25 days respectively. After 10 days of their working together, they both left then Amber came and completed the remaining work in 3 days. If Amber alone would do the work, calculate how many days he would take to complete the work.?​

Number of days Adya took to complete the work = 20

Work done by Adya in 1 day =

Number of days Ashley took to complete the work = 25

Work done by Ashley in 1 day =

So,

Total work by Adya & Ashley in 1 day =

•°• Their total work in 10 days =

Now,

The work left to be completed =

From this we know that,

Amber completes of the work in 3 days.

So,

Time taken by Amber to complete the whole work =

↦ If Amber alone would do the whole work, he would take to complete it.

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