Question

Item 8 A right rectangular prism has a length of 8 centimeters, a width of 3 centimeters, and a height of 5 centimeters. What is the surface area of the prism? Enter your answer in the box.

Answer 1

8 * 3 = 24

8 * 5 = 40

3 * 5 = 15

Therefore, the surface area of the cuboid is 2(24 + 40 + 15) = 158.

Answer 2

ANSWER

$158c {m}^{2}$

EXPLANATION

The total surface area of a rectangular prism is

$= 2(lw + lh + wh)$

The length is

$l = 8cm$

The width is

$w= 3cm$

The height is;

$h = 5cm$

We substitute the values in to the formula;

$= 2(8 \times 5 + 8 \times 3 + 3 \times 5)$

$= 2(40 + 24 + 15)$

$= 2 \times 79$

$= 158c {m}^{2}$