The frustum of right circular cone is 12 cm and has a volume 1144 cm cube . find the radii of its faces if they are as 6:5.
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Step-by-step explanation:
Volume of a frustum of a cone = 31
πh(R 2+r 2 +Rr), where h is the height and R and r are the radii of the lower and upper ends of a frustum of a cone.
Hence, volume of the frustum of the cone = 31
π×16(20 2 +8 2+20×8)=3328πcm 2
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