QUESTION
How much leather will be used to make a ball with a diameter of 20 cm?
ANSWER
Use the formula for finding the area of a ball.
- [tex] \tt A = \frac{π d²}{4}[/tex]
The symbol π is equivalent to 3.14. So,
- [tex] \tt A = \frac{(3.14)(20 \: cm)²}{4} [/tex]
- [tex] \tt A = \frac{1256 \:cm}{4}[/tex]
- [tex] \tt A = 314 \:{cm}^{2} [/tex]
Therefore, there are 314 leather will be used to make a ball with a given diameter.
