Question

The slant height of the frustum of a cone having radii of two ends as 5 cm and 2 cm respectively and height 4 cm is

Answer 1

Let r and R be the radii of the circular ends of the frustum of the cone and h be the height of the frustum.

R-r = 4 and l = 5 cm 

l² = (R-h)² + h²

5² = 4² + h²

h² = 25 - 16 

h² = 9 

h= 3 

Hence , height of the frustum is 3 cm.

Explanation:

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Answer 2

See the attachment↑↑↑

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