Answer :
The time taken by Ahmed to paint the entire wall by himself is 120 minutes.
Given that,
- Jermey and Ahmed are painting a wall. Working alone, Jeremy can paint one-fourth of the wall in 1 hour.
- Working together, Jeremy and Ahmed can paint the entire wall in 80 minutes.
- Here we assume the x for time taken by Ahmed.
Based on the above information, the calculation is as follows:
[tex]\frac{1}{240} + \frac{1}{x} = \frac{1}{80} \\\\ \frac{1}{x} = \frac{1}{80} - \frac{1}{240} \\\\ \frac{1}{x}= \frac{3-1}{240} \\\\ \frac{1}{x}=\frac{2}{240}[/tex]
x = 120 minutes.
Therefore we can conclude that The time taken by Ahmed to paint the entire wall by himself is 120 minutes.
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