The surface area of a ball is 1386 cm2. Find the radius of ball.
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Surface area of sphere=1386 cm²
4πr² =1386
4×22/7×r²=1386
r²=1386×7/22×4
r²=441/4
r=21/2=10.5 cm
4πr² =1386
4×22/7×r²=1386
r²=1386×7/22×4
r²=441/4
r=21/2=10.5 cm
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