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= 1/3 * 3.14 * 8 * 8 *15
= 1004, 8
b. t = 24 cm (dari 25 kuadrat dikurangi 7 kuadrat)
V krct = 1/3 * π * r * r * t
= 1/3 * 22/7 * 7 * 7 * 24
= 1232
c. V krct = 1/3 * π * r * r * t
= 1/3 * 3.14 * 10 * 10 * 21
= 2198
Caranya itu tapi coba dihitung lagi, takut ada yang keliru ngitung