QuestionAugust 26, 2025

1) It takes Kali eight minutes to sweep a porch.Shawna can sweep the same porch in 11 minutes.If they worked together how long would it take them?

1) It takes Kali eight minutes to sweep a porch.Shawna can sweep the same porch in 11 minutes.If they worked together how long would it take them?
1) It takes Kali eight minutes to sweep a
porch.Shawna can sweep the same porch
in 11 minutes.If they worked together how
long would it take them?

Solution
4.6(410 votes)

Answer

\frac{88}{19} minutes (approximately 4.63 minutes) Explanation 1. Calculate individual rates Kali's rate is \frac{1}{8} of the porch per minute. Shawna's rate is \frac{1}{11} of the porch per minute. 2. Sum the rates Combined rate = \frac{1}{8} + \frac{1}{11} = \frac{11 + 8}{88} = \frac{19}{88} of the porch per minute. 3. Calculate time together Time taken together = \frac{1}{\text{Combined rate}} = \frac{1}{\frac{19}{88}} = \frac{88}{19} minutes.

Explanation

1. Calculate individual rates<br /> Kali's rate is $\frac{1}{8}$ of the porch per minute. Shawna's rate is $\frac{1}{11}$ of the porch per minute.<br /><br />2. Sum the rates<br /> Combined rate = $\frac{1}{8} + \frac{1}{11} = \frac{11 + 8}{88} = \frac{19}{88}$ of the porch per minute.<br /><br />3. Calculate time together<br /> Time taken together = $\frac{1}{\text{Combined rate}} = \frac{1}{\frac{19}{88}} = \frac{88}{19}$ minutes.
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