Krishna
0

Step 1: Find the known and unknown values in the question

Step 2: Recall the relationship between the circumference and radius.

NOTE: Remember the relationship between circumference's

and radius \frac{C}{C'} = \frac{R}{R'}.

Step 3: Substitute the known values in the relationship to know the unknown value.

\frac{C}{C'} = \frac{R}{R'}.

EXAMPLE:   40 = \frac{8}{R'}

R = \frac{1}{5}