Question

A barn is shaped like a rectangular prism with a triangular prism on top as shown. The exterior four walls and two triangular faces need to be repainted. If one gallon of paint covers 232 square feet, how many gallons will it take to repaint the barn? Enter your answer in the box.

Answer 1

23 gallons is correct answer

Answer 2

23 Gallons

Explanation:

If you do 12 x 38 you get the answer for one half of the triangle if you divide it. However considering it is a whole triangle you dont have to divide it. From there you do 84 x 20 x 2 for the two long rectangular shapes on the barn. Then you do 38 x 20 x 2 for the two shorter ends. Which 38 x 20 x 2 is 1,520 you add 84 x 20 x 20 which is 3360 then you add 12 x 38 which is 456. You add 1,520 + 3,360 which is 4880 then you do 4,880+ 456 which is 5336. From there you would do 5336 / 232 and you would get 23.