The radius of a circle is increased by 1%. Find how much % does its area increa

Question

The radius of a circle is increased by 1%. Find how much % does its area increases?

Options:

A . 1.01%

B . 5.01%

C . 3.01%

D . 2.01%

Answer: Option D

r = 100 r = 101

r² = 10000 r² = 10201

10000
---- 201

100 ---- ? =>
2.01%

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