find the area of circle whose perimeter is 40 pi CM
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Answered by
1
circumference = 2πr
40 × 22/7 = 2×22/7r
125.62 = 6.28r
r = 125.62/6.28 = 20.0031cm or ~20cm
area = πr²
= 22/7 × 20×20
= 22 × 57.14
= 1257.08cm²
40 × 22/7 = 2×22/7r
125.62 = 6.28r
r = 125.62/6.28 = 20.0031cm or ~20cm
area = πr²
= 22/7 × 20×20
= 22 × 57.14
= 1257.08cm²
Answered by
1
Answer:
Area Of Circle=127.12CmSq
Step-by-step explanation:
Given:
Circumference/Perimeter-40Cm
Circumference=2pi*r
40=2*22/7*r
40=44/7*r
By Cross-Multiplication;
280=44r
r=280/44
r=6.36
Now That We Have Found Radius;
Area=pi*rSq
Area=22/7*6.36*6.36
Area=127.12CmSq
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