Question

The slant height of the frustum of a cone is 5cm.If the difference of the radii ofvits two circular ends is 4cm,find the height of the frustum

Answer 1

Answer:

Step-by-step explanation:

slant height of frustum=5

R-r=4

l²=h²+(R-r) ²

5²=h²+(4) ²

25=h²+16

25-16=h²

9=h²

h=-3, +3

As height can't be negative

H=+3