Question

A carry-on suitcase is 9.5 inches long, 16 inches wide, and 22.5 inches high. What is the surface area of the suitcase?(1 point)
Responses

3,420 in.2
3 comma 420 in. squared

725.75 in.2
725 point 7 5 in. squared

96 in.2
96 in. squared

1,451.5 in.2

Answer 1

Surface area of a rectangular prism = 2(lw + lh + wh).

lw = 9.5·16 = 152
lh = 9.5·22.5 = 213.75
wh = 16·22.5 = 360

Surface area = 2(152 + 213.75 + 360) = 2(725.75) = 1,451.5 in².

Answer: 1,451.5 in.².