Answer :
[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]
[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]