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x=22/7 × 7 × 7
= 22/7 × 49
= 154
maaf klo salah ya

Diket: v kerucut = 115,5 cm3, V gabungan = 885,5 cm3, d silinder = 7 cm -> r = 7/2 cm, phi = 22/7

Ditanya: t silinder

Jawab

V silinder = 885,5 - 115,5 = 770 cm3

V silinder = phi x r x r x t
770 = 22/7 x 7/2 x 7/2 x t
770 = 77/2 x t
t = 770 : 77/2
t = 770 x 2/77
t = 20 cm