Question

If x units are added to the length of the radius of a circle, what is the number of units by which the circumference of the circle is increased?

Answer 1

Answer:

Step-by-step explanation:

Let the radius of the circle be 'r' units.

The circumference of the circle will therefore be 2 pi r units.

If the radius is increased by 'x' units, the new radius will be (r + x) units.

The new circumference will be  

Or the circumference increases by  units.

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