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Verified answer
Kelas 9Matematika
Bab 2 - Bangun Ruang Sisi Lengkung
step 1 : menentukan jari jari
L = 2 π r t
528 = 2 x 22/7 x r x 12
r = 528 ÷ (2 x 22/7 x 12)
r = 7 cm
step 2 : menentukan volume tabung
v = π r² t
v = 22/7 x 7² x 12
v = 1848 cm³
Verified answer
LuasSelimut = 2πrt528cm² = 2 x 22/7 x r x 12cm
528cm² = 528/7 x r
r = 528 : 528/7
r = 528 x 7/528
r = 7cm
VolumeTabung = πr²t
VolumeTabung = 22/7 x 7cm x 7cm x 12cm
VolumeTabung = 22cm x 84cm²
VolumeTabung = 1.848cm³