Answer: Annette will take 6 hours to do the entire job alone.
Step-by-step explanation:
Given: Time taken by Kelly to do
of job = 2 hours
i.e. Time for complete job done alone by Kelly =![5\times2=10\ hours](https://tex.z-dn.net/?f=5%5Ctimes2%3D10%5C%20hours)
Rest of work =
of the job
of the complete job done by both Kelly and Annette in 3 hours
Time would be taken by then to do entire job together = ![3\times\dfrac{5}{4}=3.75\ hours](https://tex.z-dn.net/?f=3%5Ctimes%5Cdfrac%7B5%7D%7B4%7D%3D3.75%5C%20hours)
Let t be the time taken by Annette to do job alone.
Then, as per situation
![\dfrac{1}{3.75}=\dfrac{1}{10}+\dfrac{1}{t}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{3.75}-\dfrac{1}{10}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{4}{15}-\dfrac{1}{10}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{6}\\\\\Rightarrow\ t=6](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B3.75%7D%3D%5Cdfrac%7B1%7D%7B10%7D%2B%5Cdfrac%7B1%7D%7Bt%7D%5C%5C%5C%5C%5CRightarrow%5C%20%5Cdfrac%7B1%7D%7Bt%7D%3D%5Cdfrac%7B1%7D%7B3.75%7D-%5Cdfrac%7B1%7D%7B10%7D%5C%5C%5C%5C%5CRightarrow%5C%20%5Cdfrac%7B1%7D%7Bt%7D%3D%5Cdfrac%7B4%7D%7B15%7D-%5Cdfrac%7B1%7D%7B10%7D%5C%5C%5C%5C%5CRightarrow%5C%20%5Cdfrac%7B1%7D%7Bt%7D%3D%5Cdfrac%7B1%7D%7B6%7D%5C%5C%5C%5C%5CRightarrow%5C%20t%3D6)
hence, Annette will take 6 hours to do the entire job alone.
1/5 x 100 = 20%
Answer: 20%
It would be a direct variation.
Answer:
20
Step-by-step explanation:
When looking for the perimeter just add all the numbers together.