If the radius of a circle is decreased by 30 percent, by what percent will the area of the circular region decrease?
Created: 6 years ago |
Updated: 8 months ago
best des
Initial radius = R
Initial area = π R2
New radius = R - 30% of R = R - 0.3R = 0.7R
New area = π (0.7R)2 = 0.49 π R2
Decrease in area = (πR2 - 0.49πR2) / (πR2) × 100% = 51%
Md Azizur Rahman
Founder of Satt
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