Find the perimeter of a circle whose area is 1386 cm
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Answered by
1
Answer:
Step-by-step explanation: area of circle is pie r2
:.1386=pie.r2
:.1386=22/7×r2
:.1386×7/22=r2
:.441=r2
:.21=r
Perimetre of circle=2×pie×r
=2× 22/ 7× 21
=44× 3
=132cm
Answered by
2
Answer:
perimeter=132cm
Step-by-step explanation:
area=πr²
1386=22/7 r²
r²=1386*7/22=441
r=21cm
p=2πr
p=22/7*2*21= 132 cm
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