Name__________________________Date______________ Time___________
LESSON
11.8
Written Assessment- Part B
40 cm2
17) a. What is the surface area of the prism in Problem 12? _____________
b. Explain how you found the surface area.
I found the area of the top and doubled it, 8 2 = 16; the area of the side and
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doubled it, 4 * 2 = 8; and the area of the front and doubled it, 8 * 2 = 16.
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Then I added all of the areas together, 16 + 8 + 16 = 40 cm2.
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18) What information do you need to figure our how many square inches of
paint you would use if you painted the entire cylinder on page 207 (top, bottom,
and sides)?
The area of the base, the circumference of the base, and the height.
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19) If you place a cone inside of the cylinder in Problem 11 on page 207, and
the cone is an exact fit (that is, the apex of the cone touches the bottom of the
cylinder, and the base of the cone fits exactly at the top of the cylinder), what
20.94 in3
would the volume of the cone be? __________________________
Write a number sentence to show how you found your answer.
* 62.83 = 20.94 in3 , or 62.83  3 = 20.94 in3
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20) The pyramid at the right has the same height as the prism in Problem 6 on
page 206.
40 in3
What is the volume of the pyramid? __________
Write a number sentence to show how you found your answer.
120
V______________________________________________
= * 24 * 5, or V = 3

Area of base -= 24 in 2
Name__________________________Date______________ Time___________
LESSON
11.8
Written Assessment- Part B
Min’s fish are sick, and she wants to add medicine to the tank. The instructions
suggest adding one drop of medicine for every 4 L of water. The base of the
fish tank measures 40 cm by 25 cm. The tank is filled with water to a height of
about 20 cm.
Reminder: 1 L = 1,000 cm3
21) How many drops of medicine should
5 drops
Min add to her tank? _____________
22) Explain what you did to find the answer.
The volume of the water is 20,000 cm3 (40 * 25 * 20), which is 20 L.
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20  4 = 5 drops.
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