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r²=3V ÷ πt
r²=(3. 1884) ÷ (3,14 . 8)
r²=5652÷25,12
r²=225
r=√225
r=15 cm
s²=t²+r²=8²+15²=64+225=289
s=√289=17 cm
Luas selimut
=πrs
=3,14 . 15 . 17
=800,7 cm²