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= 4/3 × 3.14 × (7-4)^3
= 4/3 × 3.14 × 3^3
=4/3 × 3.14 × 27
=113.04
V_mula-mula = 4/3 x 22/7 x 7³ = 4312/3 cm³
V_baru = 4/3 x 22/7 x 4³ = 5632/21 cm³
perubahan volume bola :
= 4312/3 - 5632/21
= 30184/21 - 5632/21
= 24552/21
= 8184/7
= 1169, 14 (pembulatan)