Question

Note: Enter your answer and show all the steps you use to solve this problem in the provided space. What is the surface area of the prism?

Answer 1

Question -:

Find the surface area of the prism.

Explanation -:

Given:

• length = 15 mm
• width = 3 mm
• height = 4 mm

Need to find :

• Surface area

Formula :

`\star\boxed{ \small\sf Surface \: area = 2(lw + wh + lh)}`

Solution :

Surface area = 2(15×3 + 3×4 + 15×4)

→ 2(45 + 12 + 60)

→ 2(117)

→ 234 mm².

`\rule{65mm}{2pt}`

Answer 2

234 square mm

Explanation:

Surface area of rectangular prism:

l = 15 mm

w = 3 mm

h = 4 mm

`\boxed{\text{\bfSurface area of rectangular prism = 2*(lw + wh + hl)}}`

= 2* [ 15*3 + 3*4 + 4*15 ]

= 2* [45+ 12 + 60]

= 2 * 117

= 234 square mm