Question

Mr. Smith is painting the wall but not the door. A gallon of paint will cover 200 square feet. How many gallons of paint will Mr. Smith need to purchase?

Answer 1

Alright so let’s find the area of the whole wall first including the door

18x12=216 sq ft

Then we find the area of the door 7x3= 21

Then subtract that from the area of the whole wall 216-21= 195 sqft

Only 1 gallon of paint will be needed since 195 is less then 200!!

Hope this helps! :)