Question

The dimensions of a rectangular box are 8 by 5 by 9. What is the surface area?

A) 360 cubic units
B) 360 square units
C) 157 square units
D) 314 square units
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Answer 1

OPTION D

Explanation:

the surface area of a rectangle =2Lw+2Lh+2wh

L=8

h=5

w=9

we have:

the surface area of a rectangle =2*8*9+2*8*5+2*9*5

the surface area of a rectangle = 144+80+90

the surface area of a rectangle =314 square units

The answer is option D