Find the volume of the frustum cone whose base and top radius is 4 mm and 2 mm respectively. The height of the cone is 27 mm. (Use π = 3.14).
781.28 mm3
791.28 mm3
761.28 mm3
711.28 mm3
A
781.28 mm3
B
791.28 mm3
C
711.28 mm3
D
761.28 mm3
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Solution
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Volume of the frustum cone is V=πh3(R2+Rr+r2) R=4mm,r=2mm,h=27mm V=(3.14×27)/(3)[42+4×2+22] =3.14×9[16+8+4] =28.26[28] =791.28mm3
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