If r is the radius of a circle and d is its diameter, which of the following is an equivalent formula for the circumference c=2πr?
a. c=2πd
b. c=πd
c. c=πr2
d. c=πdr

Option B is correct

C=πD

Step-by-step explanation:

As per the statement:

If r is the radius of a circle and D is its diameter.

Given the circumference of the circle:

            .....[1]

where,

r is the radius of the circle.

We know that:

diameter(D) = 2r

Substitute in [1] we have;

Therefore, the equivalent formula for the circumference C=2πr is, C=πD

95.03 is the answer. hope this !

do your own work and don"t cheat.

step-by-step explanation: