Jawabanmu

2014-03-14T20:35:18+07:00
2464cm2 × 7/22=784cm2 √784cm2=28cm
2014-03-14T20:45:29+07:00
Πr²=2464cm²
22/7.r²=2464
2464 / 22/7=r²
2464.7/22=r²
√784=r
28=r

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