Calculate Radius from Circumference: Finding r When C = 400

Question

Calculate the radius using the circumference given in the figure:

00:00 Find the circle's radius (R)

00:03 We will use the formula for calculating circle circumference

00:09 We will substitute appropriate values according to the given data and calculate to find the radius

00:19 We will isolate radius R

00:31 We will substitute the value of pi and calculate to find radius R

00:42 And this is the solution to the question

63.662