Question

The diameters of the bottom of a frustum of right circular cone is 10 cm, and that of the top is 6 cm and height is 5 cm. Find out the area of the total surface and volume of the frustum.

Answer 1

Volume=1/3*22/7*(5^2+3^2+5*3)=
770/3

Answer 2

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Shruty Shubhangi asked in Math

the radii of the ends of the frustumof a cone 45cm high are 28cm and 7 cm. find its volume , the C.S.A & the T.S.A.

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Ajanta answered this

33475 helpful votes in Math, Class XII-Science

let the height of the frustum be h=45 cm

let the radius of the base be r=7 cm

its largerer radius be R=28 cm.

volume of the frustum=



slant height of the frustum l =

l=

curved surface area of the frustum=

CSA=5462.6 cm square

total surface area= curved surface area+area of the base+area of the top