Question

One pint of chalkboard paint covers 60 square feet. What is the least number of pints needed to paint the walls of a room in the shape of a rectangular prism with a length of 15 feet a width of 13 feet and a height of 10 feet

Answer 1

15.833 pints of chalkboard paint

Explanation:

Surface area of a rectangular prism = 2(lw × hl × hw)

Where,

L = length = 15 feet

w = Width = 13 feet

h = height = 10 feet

Surface area of a rectangular prism = 2(lw + hl + hw)

= 2(15*13 + 10*15 + 10*13)

= 2(195 + 150 + 130)

= 2(475)

= 950 square feet

One pint of chalkboard paint covers 60 square feet

Least number of pints needed to paint the walls = 950 square feet / 60 square feet

= 15.833 pints of chalkboard paint