What is the surface area of a rectangular solid with a length of seven inches, a width of five inches,
and a height of six inches?

A = 214 in^2

Step-by-step explanation:

Subdivide the "surface area" as follows:  top/bottom (1 each); ends (2); sides (2).

Total top and bottom surface area is A1 = 2(length)(width), or

2(7 in)(5 in) = 70 in^2

Total area of sides is A2 = 2(length)(height) = 2(7 in)(6 in) = 84 in^2

Total area of ends is A3 = 2(width)(height) = 2(5 in)(6 in) = 60 in^2

The total surface area of this rectangular solid is A = A1*A2*A3, or

A = (84 + 60 + 70) in^2, or A = 214 in^2

450

step-by-step explanation:

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