The radii of the circular ends of a frustum are 6 cm and 14 cm. If its slant height is 10 cm, then its vertical height is (a) 6 cm       (b) 8 cm     (c) 4 cm      (d) 7 cm

Explanation

Radii =

`r_{1}=14 cm, r_{2}=6 cm`



Slant height of the frustum



`l=10 cm, h=? `


`l=sqrt{h^{2}+(r_{1}-r_{2})^{2}} `


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