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130_G6U10_G6U18_WB˙—» ¿º 2011.3.25 7:6 PM ˘ ` 21
130-P4-2
3. A rectangle is rotated about its length to make a solid figure. Find the volume of
the solid figure.
6 cm
12 cm
2 cm
4. Two solid figures are made by rotating a rectangle about its length and by rotating
the same rectangle about its width. Which surface area is greater?
8 cm
4 cm
130-P4-2
3. A rectangle is rotated about its length to make a solid figure. Find the volume of
the solid figure.
6 cm
12 cm
2 cm
4. Two solid figures are made by rotating a rectangle about its length and by rotating
the same rectangle about its width. Which surface area is greater?
8 cm
4 cm
