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b. 2× 22/7 × 30 (14 + 30 )
88 (44)
3872 cm^2
maaf klu ga salah seperti itu
=1/3×22/7×14²×30
=6160 cm³
Vt=π×r²×t
6160=22/7×14²×t
6160=616t
t=6160/616
t=10cm
jadi tinggi tabung 10 cm
B. Lpt=2×π×r(r+t)
=2×22/7×14(14+10)
=2.112 cm²
jadi luas permukaan tabung adl 2.112 cm²