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Dit : Jari-jari tabung... ?
Jawaban :
Lus selimut tabung = 2πrt
528 = 2.22/7.r.12
528.7 = 2.22.r.12
3696 = 528.r
r = 3696 ÷ 528
= 7 cm.
528=12a
a=44cm
a=keliling alas/lingkaran
a=2 phi r
r= a/(2 phi)
= 44*7/(2*22)
=7 cm
Semoga membantu =)
Maaf kalo ada yang salah