Question

Find the area of circle whose diameter is 42 CM.​

Answer 1

Step-by-step explanation:

Solution:

Diameter of circle = 42 cm

➜ Radius of circle = 1/2 × 42

➜ Radius of circle = 21 cm

Formula used here:

Area of circle = πr²

Putting the values:

➪ Area of circle = 22/7 × 21 × 21

➪ Area of circle = 1386 cm²

Therefore:

The area of the circle is 1386 cm².

Answer 2

Diameter of circle = 42cm

$\sf{ Radius \: of \: circle = \frac{1}{2} \times 42 }$

$\sf{ Radius \: of \: circle =21cm }$

Formula used here

Area of circle = πr²

Putting the values,

$\sf{ Area \: of \: circle = \frac{22}{7} \times 21 \times 21 } \:$

$\sf{ Area \: of \: circle \: = 1386 {cm}^{2} }$

Therefore,

$\sf{The \: area \: of \: the \: circle \: is \: 1386 {cm}^{2} }$