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= 62,8
L = 3,14 x 10 x 10
= 314
perbandingan = 62,8 : 314
= 2 : 1
Luas = πr² = 3,14 x 10 x10 = 314 dm.
Perbandingan kll : luas = 62,8 : 314 = 20 : 100 = 1 : 5