Question

if the area of circle is 314 cm² then find the radius of circle (π=3.14)​

Answer 1

Answer:

10 cm

Explanation:

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Answer 2

Given:

✰ Area of circle is 314 cm²

✰ π = 3.14

To find:

✠ The radius of circle

Solution:

The area that is enclosed by the circle of radius r is given by the formula πr². We already know the value of area of circle and the value of pi, so we can easily calculate the radius of a circle by putting the values in the formula and forming equation.

Area of circle = πr²

• 314 = 3.14 × r²

• 314/3.14 = r²

• (314 × 100)/314 = r²

• r² = 100

• r = √100

• r = 10 cm

∴ The radius of circle ( r ) = 10 cm

Verification:

Area of circle = πr²

• Area of circle = 3.14 × (10)²

• Area of circle = 3.14 × 10 × 10

• Area of circle = 3.14 × 100

• Area of circle = 314 cm²

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