Question

find the circumference and area : a) Radius = 10 cm b) Diameter = 12 cm​

Answer 1

perimeter = 2πr

= 2×22/7×10

=440/7

Answer 2

$\mathfrak{\underline{\huge{Solution :}}}$


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a. Radius = 10 cm

In Circle,
Circumference = 2πr
Circumference = 2 × 3.14 × 10
Circumference = 62.8 cm

Area = πr²
Area = 3.14 × (10)²
Area = 314 cm²

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b. Diameter = 12 cm

Radius = $\dfrac{12}{2}$
Radius = 6 cm

In Circle,
Circumference = 2πr
Circumference = 2 × 3.14 × 6
Circumference = 37.68 cm

Area = πr²
Area = 3.14 × (6)²
Area = 113.04 cm²

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