Question

a rectangular prism has a length of 8 ft and a width of 30 ft and a height of 5 ft what is the surface area of the rectangular prism​

Answer 1

850

Explanation:

L*W=

L*H=

H*W=

then add them up.

Answer 2

`860\; \rm ft^(2)`.

Explanation:

Each rectangular prism contains six sides.

In this rectangular prism, these sides are:

• A set of two
  `5\; \rm ft` by
  `8\; \rm ft` rectangles. Area:
  `5\; \rm ft* 8\; \rm ft = 40\; \rm ft^(2)` each.
• A set of two
  `5\; \rm ft` by
  `30\; \rm ft` rectangles. Area:
  `5\; \rm ft * 30\; \rm ft = 150\; \rm ft^(2)` each.
• A set of two
  `8 \; \rm ft` by
  `30\;\rm ft` rectangles. Area:
  `8\; \rm ft * 30\; \rm ft = 240\; \rm ft^(2)` each.

Take the sum of the areas of these six rectangles to find surface area of this rectangular prism:

`\begin{aligned}& 2 * 40\; \rm ft^(2) + 2 * 150\; \rm ft^(2) + 2 * 240\; \rm ft^(2) = 860\; \rm ft^(2)\end{aligned}`.