The area of a certain circular disc is 1386 cm square .Find its radiu in very short answer s
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The radius of disc is 21 cm
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Area of circle = πr² = 1386 cm²
πr² = 1386
22/7 x r² = 1386
2/7 x r² = 126
r²/7 = 63
r² = 441
r = 21 cm
πr² = 1386
22/7 x r² = 1386
2/7 x r² = 126
r²/7 = 63
r² = 441
r = 21 cm
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