The circumference of circle is 42cm. Find the radius of the circle and area of the circle.
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Answered by
1
Perimeter = 2 × pi × r
22/7 ×r
2×22/42×7 = r
Radius = 6.681 cm.
Now, Area = pi × r²
=> 22/7 × 2×22/42×7
DID nothing, just replaced the values.
So, the required area is 21 cm².
Keep a special vigil on units.
If not, convert and solve them.
Use simplification before decimal conversion.
In the area, I used the RADIUS 1st value, and the calculation was made super easy.
Answered by
4
r≈6.68cm
hope it helps
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