eriks8273 eriks8273

05-11-2019
Mathematics

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it takes 36 minutes for 7 people to paint 4 walls.How many minutes does it take 9 people to paint 7 walls

Respuesta :

05-11-2019

4 walls need 262 people/minutes (7)(36)

1 wall takes 63 people/minutes (262/4)

7 walls need 441 people/minutes (63)(7)

9 people could do that in 49 minutes (441/9)

It is 49 minutes

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