What’s the diameter of the circle of the circumference is 30 pi inches

Mathematics

2 answers:

ICE Princess25 [194]4 years ago

6 0

30?
30pi = 2pi r
30pi / 2pi = 15
15 = r
double the radius to get the diameter
15)2 =30

Mashutka [201]4 years ago

4 0

Answer:

Step-by-step explanation:

The circumference formula for a circle is

$C=2\pi r$ or $C=\pi d$

We'll use the second one since our problem wants us to find diameter. If we know that the circumference is 30π, then we will sub in 30π for C and solve for d:

30π = πd so

30π/π = d

The π's cancel out, leaving us with a diameter of 30 inches.

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