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Verified answer
BANGUN RUANGVolume tanki
d = 9 dm = 90 cm
r = 4,5 dm = 45 cm
t = 12,5 dm = 125 cm
V1 = πr²t
V1 = 3,14×45×45×125
V1 = 794.812,5 cm³
Volume tabung
r = 15 cm
t = 25 cm
V2 = πr²t
V2 = 3,14×15×15×25
V2 = 17.662,5 cm³
Banyaknya tabung = V1/V2
= 794.812,5/17.662,5
= 45
jadi tabung yang diperlukan adalah 45