I have to paint one side of a wall. The wall is $15$ meters tall and $60$ meters long. Each gallon of paint covers $400$ square feet. If a foot is approximately $0.3048$ meters, then what is the smallest whole number of gallons I can buy and have enough paint to cover the whole wall?
wall total area:15*60=900\(m^2\)
a foot=0.3048 meters
each gallon of paint => 400 sqft,
let's convert \(900m^2\)to feet first
Since 1 foot=0.3048 meters, 1 sqft =\(0.3048^2 \) square meters
which is about 0.09290304 square meters,
\(900m^2\)is about 9687.52
9687.52/400=24.2188 but we go to the next number since we need the smallest whole number of gallons:
25