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Verified answer
Bab Bangun RuangMatematika SD Kelas VI
tabung
luas selimut = 2 x π x r x t = 2.992
2 x 22/7 x r x 20 = 2.992
r = 2.992 x 7/880
r = 23,8 cm
Lsel=2992cm^2
Lsel= 2phi R t
2992= 2×22/7 ×R×20
R=7×34/10 =23,8 cm