The circumference of a circular painting is 53.38 feet. What is the radius of the painting? Use 3.14 for pi and do not round your answer.

Question

parthkohli · Answer

Do you know the formula for circumference?

anonymous · Answer

pi times diameter

parthkohli · Answer

Hmm exactly :D

parthkohli · Answer

Or you could say 2 times radius times pi

parthkohli · Answer

2 times radius is same as diameter :P

anonymous · Answer

8.49... http://www.wolframalpha.com/input/?i=radius+for+circumference+of+53.38

parthkohli · Answer

So you can isolate r.

parthkohli · Answer

$\Large \color{MidnightBlue}{\Rightarrow 2 * 3.14 * r = 53.38 }$

$\Large \color{MidnightBlue}{\Rightarrow 6.28 * r = 53.38 }$

$\Large \color{MidnightBlue}{\Rightarrow r = 8.49569 }$