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If the radius (r) of a circle is increased by ‘x’ units, what is the number of units by which the circumference of the circle is increased?

Aπ

B

C2πr

D2πx

Answer:

D. 2πx

Read Explanation:

Let the radius of the circle be r cm Circumference of the circle = 2πr New radius of the circle = (r + x) New circumference of the circle = 2π (r + x) = 2πr + 2πx Circum increased by = 2πr + 2πx – 2πr = 2πx


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