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All members of our painting team paint at the same rate. If $15$ members can paint a specific wall in $45$ minutes, then how long would it take $20$ members to paint the same wall, in minutes?

 Jun 18, 2024

Best Answer 

 #1
avatar+1250 
+1

We can use poportions to solve this problem. 

If 15 members can paint a wall in 45 minutes, then 5 members can paint a wall in \(45*3=135\) minutes.

We multiply by 3 because the less people there are, the more time it the less people there are. 

 

Now, we multiply by 4 to get 20 members. 

Thus, we must do \(135/4\)

 

We get that \(135/4=33.75\)

 

So it takes about 33 minutes and 45 seconds. 

 

Thanks! :)

 Jun 18, 2024
edited by NotThatSmart  Jun 18, 2024
edited by NotThatSmart  Jun 18, 2024
 #1
avatar+1250 
+1
Best Answer

We can use poportions to solve this problem. 

If 15 members can paint a wall in 45 minutes, then 5 members can paint a wall in \(45*3=135\) minutes.

We multiply by 3 because the less people there are, the more time it the less people there are. 

 

Now, we multiply by 4 to get 20 members. 

Thus, we must do \(135/4\)

 

We get that \(135/4=33.75\)

 

So it takes about 33 minutes and 45 seconds. 

 

Thanks! :)

NotThatSmart Jun 18, 2024
edited by NotThatSmart  Jun 18, 2024
edited by NotThatSmart  Jun 18, 2024

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