Question

Radius Of a Circle is Increased 10%. What will be The Increase In Its Area.. Solve Step By step

Answer 1

Answer:

21%

Step-by-step explanation:

Area of a circle = πr²

Find the new radius:

The radius is increased by 10%

New Radius = r + 0.1r = 1.1r

Find the new area:

Area of a circle = π(1.1r)² = 1.21πr²

Find the increase in area:

Increase = 1.21πr² - πr² = 0.21πr²

Find the percentage increase:

Percentage increase = (0.21πr² ÷ πr²) x 100 = 21%

Answer: The area is increased by 21%

Answer 2

If r=11 Area= 3.14*(121)

121/100-1= 0.21 = 21%