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V1 = 20 dm^3
r2 = 2r1
t2 = 3t1
ditanya : V2
jawab :
V1/V2 = (1/3 × π × r1^2 × t1)/(1/3 × π × r2^2 × t2) (1/3 dan π habis)
20/V2 = (r1^2 × t1)/[(2r1)^2 × 3t1]
20/V2 = (r1^2 × t1)/(4r1^2 × 3t1)
20/V2 = (r1^2 × t)/12(r1^2 × t1) (r1 dan t1 habis)
20/V2 = 1/12 (kali silang)
V2 = 20 × 12 = 240 dm^3
maaf kalo salah
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