A cone of height 24cm has a curved surface area 550 cm2 . Find its volume.

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- Sep 7th 2010, 09:17 AMfdrhs1984Find Volume of Cone (Radius Not Given)
**A cone of height 24cm has a curved surface area 550 cm2 . Find its volume.** - Sep 8th 2010, 04:54 AMbjhoppervolume of cone
Hello fdrhs 1984,

Lateral area of cone =pi rL where L=slant height =550 sq cm

L= 550/pi r L^2 = 550^2/pi^2r^2

Draw the cross section of the cone altitude 24 cm base 2r slant height L

L^2= 24^2 +r^2 Equate the two 24^2 + r^2 =550^2 /pi^2 r^2

Set up a quadratic equation by letting x = r^2

Solve for x r is then sqrt of x.

I know the result for r. Volume is then easily calculated.Work it out.

bjh