The volume of this cone is 540 pi. Work out the height, h, of the cone
radius is 9
vol=1/3*pi*r^2*h
curved surface area =pi*r*l

20

Step-by-step explanation:

The volume of a cone is given as:

where r = radius

h = height

The volume of the cone is 540π and its radius is 9.

This implies that:

The height of the cone is 20.

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

; )

step-by-step explanation: ; )