Laura wants to paint the walls in her bedroom. A gallon of paint will cover $400 \mathrm { ft } ^ { 2 }$. She measures the surface to be painted and it is $280,126 \mathrm { in } ^ { 2 }$. How many whole gallons of paint will she need? (Rememeber: we can not but a fractional gallon)

Question

Quizplus · Accepted Answer

First, convert the area from square inches to square feet: $280,126 \mathrm{in}^2 \div 144 \mathrm{in}^2/\mathrm{ft}^2 = 1,945.4861 \mathrm{ft}^2$. Then, divide the total area by the coverage of one gallon: $1,945.4861 \mathrm{ft}^2 \div 400 \mathrm{ft}^2/\text{gallon} = 4.8637$ gallons. Since she cannot buy a fractional gallon, she needs to round up to the nearest whole number, which is 5 gallons.

Laura Wants to Paint the Walls in Her Bedroom 400ft2400 \mathrm { ft } ^ { 2 }400ft2

Laura Wants to Paint the Walls in Her Bedroom $400 \mathrm { ft } ^ { 2 }$