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V = 77 cm³
7² x 22/7 x 12 = 77 cm³
1848 = 77 cm³
24 = 1 cm
Jari-jari alas :
7/24 x 1cm = 0.291666 cm
Tinggi :
12/24 x 1cm = 0.5 cm
t=12/7 r
V=⅓πr²t
77=⅓×22/7× r²× 12/7 × r
77=88/49 r³
r³= 77 × 49/88
r=³√42,875
r=3,5 cm
t=12/7 r
t=12/7 × 3,5
t=6 cm