Question

The net below shows the dimensions of Michelle’s living room. She is going to put wallpaper on the living room walls.

What is the difference, in square yards, between the total and lateral surface areas of the room?
Answer this, please

Answer 1

42 square yards I think

Answer 2

The difference between the total and lateral surface areas of the room is 42 square yards.

Explanation:

The lateral surface area of an object is the surface area of everything EXCEPT for the top and bottom of the object.

2(6*4.2) + 2(4.2*3.5) = 79.8 square yards

The total surface area of an object is everything INCLUDING the top and bottom of the object.

79.8 + 2(6*3.5) = 121.8 square yards

121.8 - 79.8 = 42 square yards