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t=20
rumus. :π×r×r×t
=22/7×14×14×20
=22×2×14×20
=44×14×20
=616×20
=12320cm³
10.diketahui:r=7
t=16
rumus:π×r²×t
=22/7×7×7×16
=22×1×7×16
=22×7×16
=154×16
=2464DM³
Mohon maaf jikasalah