McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
2. Surface Areas of Prisms and Cylinders
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Exercise 17 Page 818

The lateral area of a right prism is L=P h, where P is a perimeter of the base and h is the height of the prism. The surface area of the prism is S=L+2B, where B is the area of the base.

Lateral Area: 1484.8 square centimeters
Surface Area: 1745.2 square centimeters

Practice makes perfect

A cereal container can be modeled by the following right rectangular prism with a length of l= 18.6 cm, a width of w= 7 cm, and a height of h= 29 cm.

We are asked to find the lateral and the surface area of the container and round the answers to the nearest tenth if necessary. The lateral area of a right prism is L=P h, where P is the perimeter of the base. This tells us that P=2* 18.6+2* 7=51.2 centimeters. Now, let's find L!
L=P h
L=(51.2)( 29)
L=1484.8
The lateral area is L=1484.8 square centimeters. The surface area of the prism is S=L+2B, where B is the area of the base. Since the base is a rectangle that is 18.6 cm by 7 cm, its area is B= 18.6* 7=130.2 square centimeters. Finally, let's find the surface area of the container.
S=L+2B
S=1484.8+2(130.2)
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Simplify right-hand side
S=1484.8+260.4
S=1745.2
The surface area is 1745.2 square centimeters.