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V=πr²t
r²=V÷(πt)=198÷22/7.7=198÷22=9
r=√9=3 cm
b) Ls=2πrt=2.22/7.3.7=44.3=132 cm²
c)
L=2πr(r+t)=2.22/7.3(3+7)=188,57 cm²
V = t
198 = x x 7
198 = 22 x
= 9
r =
r= 3