Question

I REALLY NEED SOMEONE TO HELP ME WITH AT LEAST ONE OF THESE PROBLEMS.. PLEASE The solid is similar to a larger solid with the given scale factor, find the surface area and volume of the larger solid.cone: scale factor 3:4, SA=96pi cm^2, V=96pi cm^3

Answer 1

do you mean that the height and the radius are proportionally larger in the bigger cone?

Answer 2

im not sure its the second one in this picture.

Answer 3

can u please help me?

Answer 4

okay, can you get the radius from the surface area and post it here?

Answer 5

how would i do that

Answer 6

surface area = 96
so what is the radius?

Answer 7

what is the formula for SA of a cone?
what is the formula for Volume of cone?

Answer 8

R=2.76395

Answer 9

Cone (surface) pi * radius * side
Cone (1/3) * pi * radius2 * height

Answer 10

http://math.about.com/od/formulas/ss/surfaceareavol_2.htm

Answer 11

okay so how do i find the radius

Answer 12

?

Answer 13

radius would be 4?

Answer 14

multiply old radius by (3/4) and plug that into equation to get new parameters of cone

Answer 15

If two similar solids have a scale factor of
a:b then corresponding areas have a
ratio of a2:b2, and corresponding
volumes have a ration of a3:b3.

Answer 16

Surface area

Surface area

a2

=

b2

Volume

Volume

a3

=

b3