Question

12. The figure shows a cylindrical coin of height 2 mm. If the volume

of the coin is 515 mm. find the base radius of the coin.
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Answer 1

515 divided by 2 = x
x divided by pi = y
Square root of y = radius

Sorry. I don’t have a calculator on me but these are the steps.

Answer 2

Explanation:

πr²h = 515

3.14*r² * 2 = 515

`r^(2)=(515)/(3.14*2)=82.01\\r=√(82.01)=9.055=9.05`

r = 9.05mm