Page 129 - TB_5B

Activity 2 Applications 2 ft
2 ft
Find the volume of a prism with a hollow
space in the middle. 6 ft

4 ft
3 ft

Method 1 Use the volume of a rectangular prism.

Find the volume of the Find the volume of the Subtract the volume of the
larger rectangular smaller rectangular smaller rectangular prism
prism. prism. from the volume of the
larger rectangular prism.

6 ft 6 ft V (3 4 6) (2 2 6)
72 24
4 ft 2 ft 2 ft 48 (ft3)
3 ft V2 2 6
V3 4 6
24 (ft3)
72 (ft3)

Method 2 Use the area of the base.

Find the area of the base. Multiply the area of the
base by the height.

4 ft 2 ft VAh Volume of prism
2 ft 86 (area of base) height
48 (ft3)
3 ft

A (3 4) (2 2)
12 4
8 (ft2)

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