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alas Δ = jari2 = 2x
tinggi Δ = tinggi limas = 3x
garis pelukis² = alas² + tinggi²
(2√13)² = (2x)² + (3x)²
52 = 4x² + 9x²
52 = 13 x²
x² = 4
x = √4
x = 2
maka r = 2x = 2(2) = 4
t = 3x = 3(2) = 6
volume kerucut = 1/3 x luas alas x TL
= 1/3 x π x r x r x t
= 1/3 x 3,14 x 4 x 4 x 6
= 100,48