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= 3 × volume / t
= 3 × 18480/10
= 5544 cm²
r alas kerucut = √(5544/π) = 42 cm
s = garis pelukis kerucut = √(10² + 42²) = 43,174 cm
luas selimut kerucut
= πrs
= 5698,98 cm²