sebuah tabung tanpa tutup memiliki jari jari 6,5cm dan tinggi 18cm tentukan luas permukaan tabung tersebut
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r = 6,5 cm
t = 18 cm
maka :
Lp tabung tanpa tutup
= phi.r.(r+2t)
= 3,14.6,5.(6,5+2.18)
= 20,41.(6,5+36)
= 20,41.42,5
= 867,425 cm² ~ dibulatkan 867,4 cm² Lp tabung tnp tutup = phi x r (r + 2t) = 3,14 x 6,5 (6,5 + 36) = 20,41 x 42,5 = 867,425 [answer.2.content]
t = 18 cm
maka :
Lp tabung tanpa tutup
= phi.r.(r+2t)
= 3,14.6,5.(6,5+2.18)
= 20,41.(6,5+36)
= 20,41.42,5
= 867,425 cm² ~ dibulatkan 867,4 cm² Lp tabung tnp tutup = phi x r (r + 2t) = 3,14 x 6,5 (6,5 + 36) = 20,41 x 42,5 = 867,425 [answer.2.content]
