# How to get the circumference of a circle

We
would know either the diameter or the radius of a circle to calculate its
circumference. Then, in this equation, we utilize the proper value: C=2πr (of
course, "r" stands for radius).

As
we know, the formula for finding the circumference of a circle equals pi time
diameter.

C=π
d

Just
like, more formulas we use abbreviations: C for circumference and d for
diameters. That's a pretty simplest formula. It tells us that if we know the
diameter of a circle, all we have to do is multiply the diameter.

**Problem****:
A circular rug has a diameter 46m.what is the circumference of a circular rug?**

**Solution****:**

Circular rug’s diameter = 42 m

Circumference of a circular
rug=?

By
using the circumference formula

Circumference of a circular
rug = π

Circumference of a circular
rug = π

Circumference of a
circular rug = 132 m

**Problem: ****Johan
drove the car. His car wheel has a diameter is 4 m. Find the distance covered
when it completes 50 revolutions?**

**Solution:
**

Firstly,
to find the distance covered in 1 revolution, we have to find the circumference
of the wheel.

The
radius of wheel = diameter of wheel/2

=4/2=2 m

Distance
covered when 50 revolutions are completed = 50
circumference of the wheel

=50

=50

=616 m

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