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i don't know how to start this problem. please help me solve it so i know how to do these in the futuresmiley

 

Alice is picking up trash in the community park. She can rid the whole park of trash in 5 hours. After she works for 2 hours, her friend Brenda comes and helps her. The two of them finish in 1 more hour. How fast can Brenda clean the park, by herself?

 Aug 11, 2022
 #1
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Alice is picking up trash in the community park. She can rid the whole park of trash in 5 hours. After she works for 2 hours, her friend Brenda comes and helps her. The two of them finish in 1 more hour. How fast can Brenda clean the park, by herself?

 

Alice cleans 1 park in  5 hours

After 2 hours, Alice has cleanted  2/5 of the park

There is 3/5 of the park left to clean

 

Brenda comes and helps and the job is finished in 1 hour

In one hour Alice will clean 1/5 of the park which means that Brenda cleans 2/5 of the park in this time

So

Branda is working twice as fast as Alice.

So

Brenda can clean the whol park by herself in how much time?   

 

Your turn to answer.,    laugh

 Aug 12, 2022
 #2
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2.5 hours, right? thanks melody laugh

Guest Aug 12, 2022
 #3
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Yes good.  

And thanks for responding.

Melody  Aug 12, 2022

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