+0

relatively urgent

0
266
3

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

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
+118652
+1

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?

Aug 12, 2022
#2
+1

2.5 hours, right? thanks melody

Guest Aug 12, 2022
#3
+118652
0

Yes good.

And thanks for responding.

Melody  Aug 12, 2022