1. Volumes of Rectangular Prisms and Cylinders
COURSE 2 LESSON 8-9
Find the volume of the cylinder. Round to the nearest cubic centimeter.
Use the formula.
V = r 2h
= ( )(2)2(9)
Substitute.
Use a calculator.
The volume of the cylinder is about 113 cm3.
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2. Volumes of Rectangular Prisms and Cylinders
COURSE 2 LESSON 8-9
A glass is 7.4 cm tall. The base of the glass has a diameter of 2.2 cm. Estimate the volume that the glass can hold if it is filled to the top. Then find the volume to the nearest cubic unit that the glass can hold if it is filled to the top.
Use 3 to estimate .
= (3)(1.1)2(7.4)
29.6
Use the formula.
Estimate:
= 4(7.4)
Use 4 to estimate 3.63 (3 • 1.21).
V = r 2h
The estimated volume is 29.6 cm3.
Actual volume: V = ( )(1.1)2(7.4)
The actual volume is about 28 cm3.
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3. Volumes of Rectangular Prisms and Cylinders
COURSE 2 LESSON 8-9
Find the volume of each figure to the nearest cubic unit.
2,304 ft3
8,743 cm3
8-9