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Units of measure?
A compact disk has a diameter of 11.8cm. What is the surface area of the disk in square centimeters? In square meters?
2 Answers
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- 1 decade agoFavorite Answer
A=area , D=diameter
A=(3.14*D^2)/4
D=11.8cm A=(3.14*11.8^2)/4=109.36 cm^2
A=109.36 cm^2 * 10^(-4)(m^2)/(cm^2)=0.0109 m^2
- 1 decade ago
You need Pie (cant find it on my keyboard) R squared. Where R is the radius.
Use the the value in cm to get cm2 and m to get m2
109.35cm2
0.011m2
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