The radius of the top and bottom of a frustum having height \( 21 \mathrm{~cm} \) are \( 25 \mat...

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The radius of the top and bottom of a frustum having height \( 21 \mathrm{~cm} \) are \( 25 \mathrm{~cm} \) and \( 8 \mathrm{~cm} \). The volume of the bucket is
a. \( 4000 \mathrm{~cm}^{3} \)
b. \( 19558 \mathrm{~cm}^{2} \)
c. \( 19558 \mathrm{~cm}^{3} \)
d. \( 18068 \mathrm{~cm}^{3} \)
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