SOLUTION: The top of a soda can has a 6.3 cm diameter. What is its radius? its circumference? its area?

Question 105031: The top of a soda can has a 6.3 cm diameter. What is its radius? its circumference? its area?
Answer by BurningFlame_marc(77) (Show Source): You can put this solution on YOUR website!
Hello!

The radius of a circle is equal to

With those solution let's find it's radius.
radius is equal to so it is equal to 6.3(which is the diameter)/2
The radius is 3.15cm

Let's find the circumference.
with the value 3.14 as pi, now we know that it is equal to 2*3.14*3.15.
The circumference is 19.782cm

Let's find the area.

it is equal to 3.14*3.15^2
The area is 31.15665cm^2

note: is most of the time equal to 3.14

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