whats the circumference of a circle with a diameter of 20 inches

Question

 A)20 B)30 C)42 D)50 E)102

Answer 1

Hi Alexandrea,

 

Is it possible that the answers were mistyped?  The formula to find the circumference of a circle, using the diameter is

 

         C  = pi(d)     Circumference equals pi times diameter

 

     ... for this problem then:

 

         C  = 3.14159265359(20)

 

         C = 62.83 (rounded to the hundredths place)

 

Not seeing that as an answer listed :-)

 

Hope this helps!

 

Lorie Soliwoda-Truong