Lei is painting the outside of a jewelry box that is in the shape of a rectangular prism. Its length is 18cm, it's width is 6 cm, and its height is 3cm. What is the surface area of the jewelry box in square meters?

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Mathematics

15 March, 07:56

Lei is painting the outside of a jewelry box that is in the shape of a rectangular prism. Its length is 18cm, it's width is 6 cm, and its height is 3cm. What is the surface area of the jewelry box in square meters?

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Lucy Mccullough · Answer 1

To solve this problem you must apply the proccedure shown below:

1. You have that th rectangular prism has the following dimensions: Its length is 18 cm, its width is 6 cm, and its height is 3 cm.

2. Then, you must apply the formula for calculate the surface area of a rectangular prism, which is:

SA=2 (WL+HL+HW)

Where SA is the surface area of the rectangular prism, L is the lenght, W is the width and H is the height.

3. Therefore, when you susbtitute values into the formula shown above, you obtain:

SA=2 (WL+HL+HW)

L=18 cm

W=6 cm

H=3 cm

SA=2[ (6 cm) (18 cm) + (3 cm) (18 cm) + (3 cm) (6 cm) ]

SA=360 cm^2