Question

I want to know how to calculate the radius, Im very confused.

The cones below are similar, although not drawn to scale
(smaller cone) (larger cone)
height is 12 ft height is 15 ft r
radius is 8 ft radius not given

What is the lenght of the radius of the larger cone?

a= 10ft
b=11ft
c=12ft
d=13ft

1 0 10

Answer 1

a 10 ft

Explanation:

To find the height of similar shapes, write a proportion of equal ratios.

`(12)/(15)=(8)/(y)`

Cross multiply to solve for y.

12y = 15(8)

12y = 120

y=10