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 ______.

विकल्प

• `sqrt26` cm

• 5 cm

• `sqrt65` cm

• 25 cm

Answer 1

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 5 cm.

Explanation:

l = `sqrt("h"^2 + ("R - r"))`

`= sqrt((4)^2 + (5 - 2)^2)`

`= sqrt(16 + 9)`

`= sqrt25`

= 5