Question

if a radius of a cricle is reduced by 10% what is the area​

Answer 1

Answer:

ANSWER AS FOLLOWS.

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Answer 2

Answer:

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Step-by-step explanation:

Let, the radius be r. Then area of circle = PI * r * r

Radius is diminished by 10% so New radius, R = r - ( 10 * r / 100 )

= > R = 0.9 * r

New area = PI * R * R

Putting value R = 0.9 * r

New area = 0.81 * PI * r *r

Diffrence = Old area - New area

=> Diffrence = PI * r * r - 0.81 * PI * r * r

=> Diffrence = 0.19 * PI * r * r

Diminished area = 19%