Answer:
800[tex]\pi[/tex]cm²
Explanation:
Given parameters:
radius of the coin = 20cm
Unknown:
Surface area of the coin = ?
Solution:
A coin is made up of two faces;
Surface area = 2(πr²)
Insert the parameters and solve;
Surface area = 2([tex]\pi x 20^{2}[/tex])
Surface area = 800[tex]\pi[/tex]cm²
