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K = 2πr
44 = 2 x 22/7 x r
44 = 44/7 r
44/7 r = 44
r = 44 x 7/44 =7 cm
L tabung = 2 πr ( r + t )
= 2 x 22/7 x 7 ( 7 + 8 )
= 44 x 15
= 660 cm²
44 =
d = 14 cm
diketahui d = 14 cm
maka r =
r = 7 cm
Luas permukaan tabung
= 2 x luas alas + luas selimut tabung
= {2 x } + {keliling x tinggi tabung}
= {2 . } + {44 x 8}
= 308 + 352
= 660
maka Luas permukaan tabung = 660