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b. 1056 cm^2
c. 2288 cm^2
d.14784 cm^3
r = 14cm
t = 12cm
dit a. La
b. ls
c. lp
d. v
a. La= πr²
La= 22/7×14×14
La= 22×2×14
La=616cm²
b. Ls= 2πrt
Ls = 2×22/7×14×12
Ls = 2×22×2×12
Ls = 1056cm²
c. lp= 2×La+Ls
lp= 2×616+1056
lp= 1232+1056
lp= 2288cm²
d. v= La×t
v= 616×12
v= 7392cm³