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l.lingkaran=pi.r²
150=3,14.r²
150.3,14=r²
47.77=r²
r²=47.77
r=√47.77
r=6.91
vk=1/3.pi.r².t
vk=1/3.3,14.6,91.6,91.18
vk=1/3.3,14.47.77.18
vk=3,14.47,77.6
vk=899,9868cm³
V = 1/3 x 150 x 18
V = 150 x 6
V= 900 cm3