Question

What is the surface area of this rectangular prism?

5 ft
4 ft
12 ft

Answer 1

Solution :-

We know that

SA = 2(lw + wh + lh)

SA = 2[(5 × 4) + (4 × 12) + (5 × 12)]

SA = 2[20 + 48 + 60]

SA = 2[128]

SA = 256 ft²

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Answer 2

256 ft²

Explanation:

`SA=2(lw+lh+wh)` where l is length and w is width and h is height

Plug in the given information

`SA=2(5*4+5*12+4*12)\\SA=2(20+60+48)\\SA=2(80+48)\\SA=2(128)\\SA=2(128)\\SA=256`

Therefore, the surface area of the rectangular prism is 256 ft².

I hope this helps!