Answer:
390 square inches
Explanation:
The surface area of a cuboid is the sum of the areas of all six of its faces. The six faces of a cuboid are two rectangles, two squares, and two rectangles.
To find the surface area of a cuboid, we can use the following formula:
Surface area = 2(lw + wh + lh)
where:
- l is the length of the cuboid
- w is the width of the cuboid
- h is the height of the cuboid
In this case:
- l = 14 in
- w = 3 in
- h = 9 in
Now,
Substitute these values in the formula:
We gwt
Surface area = 2((14 × 3) + (3 × 9) + (14× 9))
Surface area = 2(42 + 27 + 126)
Surface area = 2(195)
Surface area = 390 in²
Therefore, the surface area of the cuboid is 390 square inches.