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L.S.Kerucut = π.r.s
353,25=3,14×7,5×s
353,25=23,55×s
353,25/23,55 = s
s= 15
Selanjutnya mencari L.Permukaan Kerucut.
L.P.Kerucut = π.r(r+s)
=3,14.7,5(7,5+15)
=23,55(22,5)
=529,875 cm²
Maaf Kalo' salah :)