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All members of our painting team paint at the same rate. If 8 members can paint a specific wall in  36minutes, then how long would it take 18 members to paint the same wall, in minutes?

 May 20, 2020
 #1
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I guess it's 81 surprise

 May 20, 2020
 #2
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Actually, it would take 12 minutes.

 May 20, 2020
 #3
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12 minutes is incorrect.

aperson  May 20, 2020
 #4
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*1 and 12 are incorrect it is 8  minutes

 May 20, 2020
 #5
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8 minutes is incorrect.

aperson  May 20, 2020
 #6
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If there is an increase of 18/8 =2.25 times in manpower, there should be a corresponding decrease in time.
Therefore, 36 minutes x 1/2.25 = 16 minutes for 18 people to finish the job.

 May 20, 2020
 #7
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oops I thought it said how long for 9 people

NightShade  May 20, 2020

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