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Volume=3.080 cm^3
tinggi=20 cm
Luas permukaan?
Luas permukaan=
2πr(r+t)
2.22/7.7(7+20)
44.(27)
1.188 cm^2
---------------
Catatan:
V=πr^2xt
3.080=22/7.r^2x20
3.080=r^2x440/7
3.080/(440/7)=r^2
3.080x(7/440)=r^2
49=r^2
√49=r
7=r
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3.080 = 22/7 x r² x 20
r² = (3.080 x 7)/440
r² = 21.560/440
r² = 49
r = √49
r = 7 cm
Lp = 2πr(r + t)
Lp = 2 x 22/7 x 7 x ( 7 + 20)
Lp = 44 x 27
Lp = 1.188 cm²