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1256 = 3,14 x r²
1256/3,14 = r²
400 = r²
r = √400
r = 20 cm
selimut = πdt
= 3,14 x 40 x 48
= 125,6 x 48
= 6.028,8 cm²
π x r² = 1256
3,14 x r² = 1256
r² = 1256/3,14
r² = 400
r = √400
r = 20 cm
Ls = π x r x t
= 2 3,14 x 20 x 48
= 125,6 x 48
= 6.028,8 cm²