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Vk = (1/3).π.r².h
Vk = (1/3).π.r².r
200 = (1/3).π.r³
π.r³ = 600
Vb = (2/3).π.r³ (karena setengah bola maka (2/3).π.r³)
Vb = (2/3).600
Vb = 400 cm³
Vb-Vk = 400 -200
= 200 cm³
2. (300x+3520+4000+3780+500x-2000)/(26+2x) = 378
(300x+3520+4000+3780+500x-2000) = 378.(26+2x)
9300 + 800x = 9828+756x
44x = 528
x = 12
maka modus = 300
median = 400