178k views
3 votes
Proport

4. Andy painted 400 square
feet in 3 hours. How long
would it take him to paint
720 square feet?

User Bjarte
by
7.3k points

2 Answers

5 votes

Answer:

5.25, 5/14, or 21/4 hours

Explanation:

400 700

------ = ------

3 x

User Sean Lin
by
8.6k points
6 votes
It takes 5 minutes per square foot (400/180=5) and so 5 minutes per square for 720 squares: 720x5=3,600. 3,600 minutes is equivalent to 60 hours so it takes him 60 hours.
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