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Question

If the radius of a circle is increased by 10%, then the corresponding area of new circle will be _______.
  1. 121πr2
  2. 12.1πr2
  3. 1.21πr2
  4. None of the given three

A
1.21πr2
B
None of the given three
C
121πr2
D
12.1πr2
Solution
Verified by Toppr

Let the original radius be x.
Then, new radius =x+10100x=11x.

Therefore, area =πr2
=π(11x)2
=121x2)
=π(121πx2
=121πr2.

Hence, option C is correct.

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