Leah gets to paint her room since she bought a new set. Two of her paint covers 800 square feet. How many gallons of paint will Leah need to paint entire room, which is 1,200 square feet?

1 Answer
vanessa
Jun 11, 2017

Leah needs 3 cans of paint, but you didn't say how many gallons were in each can, so I can't give you the answer in gallons.

Explanation:

To solve this, we use cross-multiplication. You said that two cans of paint covers 800 square feet, and she needs to cover 1,200 square feet. We set the equation up as follows.

#2/800=x/1200#

Next, we cross-multiply to find that:

#800x=1200*2#

We simplify to find:

#800x=2400#

Then divide, to find:

#x=3#

So, Leah needs 3 cans of paint to paint her room completely. You didn't specify how many gallons are in each can, but if you know that, just multiply the number of gallons in each can by three to get your final answer.

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