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r=28/2=14=t
volume tabung=pi×r²×t
=22/7×14×14×14
=22×2×14×14=8624 dm³
Tinggi tabung = 28 : 2 = 14 dm
Volume = Luas alas x tinggi
Luas alas = 22/7 x r x r
= 22/7 x 14 x 14
= 616 dm2
kembali ke Volume
= 616 dm2 x 14 dm
=8624 dm3