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All of the members of our spray-painting team paint at the same speed. If 5 team members can paint a certain wall in 27 minutes, then how many minutes would it take 18 of our team members to paint the same wall?

 Jun 11, 2021
 #1
avatar+517 
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Okay from the question, 

5 members can paint wall in = 27 min

 

∴ By inverse proportion, 

18 members can paint wall in \(={27 *5 \over 18}\)

                                                = 7 min and 30 sec

 Jun 11, 2021
 #2
avatar+114084 
+1

These question still make me thinkg

I do them a bit at a time.

 

5 people take 27 minutes

so one person must take 27*5=135 minutes

so 18 people will take 135 divided by 18 = 7.5minutes

= 7 minutes 30 sec   just as answer guest said.

 Jun 12, 2021

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