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nikitadnepr [17]
3 years ago
14

It takes 32 minutes for 3 people to paint 4 walls. How many minutes does it take 4 people to paint 7 walls?

Mathematics
2 answers:
professor190 [17]3 years ago
7 0

Answer:

42

Step-by-step explanation:

that is the answer on khan academy

hope that helped!

a thanks would be appreciated! ;)

meriva3 years ago
4 0
We order these data:

32 minutes------------------------3 people------------------4 walls
x--------------------------------------4 people------------------7 walls
The minutes and the people are variables inversely proportional , therefore, we multiply in parallel
32 minutes*3 people=x*4 people

The minutes and the walls are variables directly proportinal; therefore, we  multiply cross.
32 minutes*7 walls=x*4 walls

Therefore:
32 minutes*3 people*7 walls=x*4 people*4 walls
x=(32 minutes*3 people*7 walls) / (4 people* 4 walls)
x=42 minutes.


Answer: the time will be 42 minutes.
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=============================

Explanation:

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