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132= 22/7 . d
d = 132 . 7/22
d = 6 . 7
d = 42
r = 42/2 = 21
lp = 2 . 22/7 . 21 ( 21+ 9 )
lp = 44. 3 (30)
lp = 132 (30)
lp = 3960 cm2
132 = 44/7 x r
r = 21
Luas selimut = Kelilng x tinggi
= 132 x 9 = 1188
Luas alas = 22/7 x 21 x21
= 1386
Luas permukaan = 1188 + 1386 + 1386 = 3.960 cm2