Question

if 3 gallons of paint cover a surface containing 825 square feet, how many gallons will need to be painted in 1,295 square feet

Answer 1

ratio and proprtion

paint/area=3/825

so if we wat 1295

3/825=?/1295
multily both sides by 1295
4.7090909090909090909090909090909=?
so about 4.7 gallons needed
just buy 5 gallons or 4.75 if possible