Answer :


A =7

7^2*3.14*7 sorry I did the equation wrong at first


coa514
[tex] 7^{2} * 3.14 * a =1077.02 [/tex]
[tex]49 * 3.14 * a =1077.02[/tex]
[tex]153.86 * a =1077.02[/tex]
[tex]153.86 / 1077.02 = 7[/tex]
[tex]a=7[/tex]

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