7th Grade Math

586 Volume and Surface Area

Find the surface area of each triangular prism. Round to the nearest tenth

if necessary.

Example 4

13.

10 m

24 m

14 m

17.2 m

14. 3 ft

7 ft

4 ft

5 ft

15.

10 cm

3 cm

12 cm

8 cm

16.

5 in.

12 in.

4 in.

13 in.^

B 17. MUSIC To the nearest tenth, find the

5.6 in.

0.4 in.

7.5 in.^5 in.

approximate amount of plastic covering the

outside of the CD case.

18. MEASUREMENT What is the surface area
    of a rectangular prism that has a length of
    6.5 centimeters, a width of 2.8 centimeters,
    and a height of 9.7 centimeters?

1919 ALGEBRA Write a formula for the surface area S.A. of a cube in which

each side measures x units.

20. PACKAGING A company will make a cereal box with whole number
    dimensions and a volume of 100 cubic centimeters. If cardboard costs $0.05
    per 100 square centimeters, what is the least cost to make 100 boxes?


21. GRAPHIC NOVEL Refer to the graphic novel frame below. What
    dimensions would allow the students to maximize the volume while
    keeping the surface area at most 160 square feet? Excess metal is
    permitted. Explain your reasoning.

We are designing

a dunk tank.

Remember, we

want to

maximize the

volume and

minimize the

surface area.

Re

wa

ma

vol

min

su

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