Question

Use the formula S equals 2 left-parenthesis l w right-parenthesis plus 2 left-parenthesis l h right-parenthesis plus 2 left-parenthesis w h right-parenthesisto find the surface area of a rectangular prism with the following dimensions: length = 2 cm width = 3 cm height = 4 cm. Whats the answer?

Answer 1

Which expression should follow the subtraction in Hallie’s equation?

(l + w)

(l – w)

left-parenthesis StartFraction l plus w Over 4 right-parenthesis.

left-parenthesis StartFraction l plus w Over 4 EndFraction right-parenthesis.

Explanation:

(l + w)

Answer 2

Answer: 52 square cm

Explanation:

The given surface area formula of a rectangular prism,

S = 2 wl + 2 lh + 2 hw

Where is the length, w is the width and h is the height of the prism,

Here, length, l = 2 cm,

Width, w = 3 cm

And, Height, h = 4 cm

Thus,The required surface area of the prism,

S = 2 × 3 × 2 + 2 × 2 × 4 + 2 × 4 × 3

S = 12 + 16 + 24 = 52 square cm.