Question

If the radius of a circle is increased by 100%, then the area of the circle increased by
(A) 100%
(B) 200%
(C) 300%
(D) 400%
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Answer 1

Answer:

c

Step-by-step explanation:

area= πr²

A=π(2r) ²

=4times so total 400%but increased area =400-100=300%