Question

98. If circumference of a circle decreases by 50%,
then the area of the circle is decreased by
(1) 12.5% (2) 25% (3) 50% (4) 75%​

Answer 1

Answer:

656

786

6543

9800

Explanation:

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Answer 2

Answer:

25%

Explanation:

Perimeter of a circle=2*pi*r, where r is the radius.

Since 2 and pi are constant, therefore the only variable is r. Thus if the circumference is decreased by 50%,the radius becomes half.

Therefore, new area =pi*r^2=>pi*r'/4