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Karlie1998 Karlie1998
  • 23-08-2015
  • Mathematics
Answered

Suppose the circumference of a circle is 15pi. What is its diameter?

Verified Answer :

Anonymous Anonymous
  • 23-08-2015

The circumference of a circle is proportional to its diameter.

\(C\propto d\\ \\ \therefore \quad C=kd\)

Now, when d=1, C=π, therefore:

k=π

This means that:

\(C=\pi d\)

If C=15π:

15π=πd

Therefore:

d=15

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