34.volume tumpeng yang diarsir adalah

d = 24
r1 = 12
t¹ = 18
t² = 6

r2/r¹ = t²/t¹
r2/12 = 6/18
r2 = 12x6/18
r2 = 4

V = (πr1²t¹ - πr2²t²)/3 = (π x 12² x 18 - π x 4² x 6)/3
= (2.592π - 96π)/3
= 2.496π/3
= 832π cm³

jawaban : C