the radius of a circle is 28 cm find its area
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Answer:
r = 28cm
π = 22/7
area = πr²
area = 22/7 x 28 x 28
area = 22/7 x 784
area = 22 x 112
area = 2464 cm
The area of the circle is 2464 cm²
Given :
The radius of a circle is 28 cm
To find :
The area of the circle
Formula :
Area of a circle of radius r unit is πr² unit²
Solution :
Step 1 of 2 :
Write down the radius of the circle
By the given condition
Radius of the circle = r = 28 cm
Step 2 of 2 :
Find area of the circle
The area of the circle
[tex]\displaystyle \sf{ = \pi {r}^{2} \: \: {cm}^{2} }[/tex]
[tex]\displaystyle \sf{ = \frac{22}{7} \times {(28)}^{2} } \: \: {cm}^{2} [/tex]
[tex]\displaystyle \sf{ = \frac{22}{7} \times 28 \times 28 } \: \: {cm}^{2} [/tex]
[tex]\displaystyle \sf{ = 88 \times 28 } \: \: {cm}^{2} [/tex]
[tex]\displaystyle \sf{ = 2464 } \: \: {cm}^{2} [/tex]
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