Answer:
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
