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If the circumference of a circle is diminished by 10 %, then its area is diminished by
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Given:
– Circumference decreased by 10% ⇒ New radius = 0.9r.
New area:
A’ = π(0.9r)² = 0.81πr² = 0.81A.
Decrease in area:
A – A’ = A – 0.81A = 0.19A.
Percentage decrease:
(0.19A / A) × 100 = 19%.
This question related to Chapter 11 Mathematics Class 10th NCERT. From the Chapter 11 Area related to Circle. Give answer according to your understanding.
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