Question

Andy painted 400 square feet in 3 hours. At that rate, how many cars could they wash in 7 hours? *

Answer 1

Answer:

It will take 5.4 hour to paint 720 square feet

Step-by-step explanation:

The question should be like this"Andy painted 400 square  feet in 3 hours. How long  would it take him to paint  720 square feet?"

In 3 hours = 400 square  feet is painted

1 square feet is painted in $\dfrac{3}{400}\ h$

To find time to paint 720 square feet multiply the above term by 720 as follows :

$720\ ft^2=\dfrac{3}{400}\times 720\ h\\\\=5.4\ h$

So, it will take 5.4 hour to paint 720 square feet.