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Sagot :

Bonjour,

A)

r = 3,3/2 = 1,65

 π*1,65² = 2,7225π cm²

(2,7225 *π)/3  > 0, 9075π cm³

B)

r= 6,5/2 =3,25

3,25²π  cm²

(3,25²π)/3 => 3,52π cm³

C)

r= 8,4/2 = 4,2

4,2²π cm²

(4,2²π )/3 =>5,88π cm³

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