2. A cone has volume 12r cubic inches, Its height is 4 inches, What is its radius?

r - 1.69 inches

Step-by-step explanation:

Volume of a cone is

V = πr^2h/3

V - volume of the cone

π - 3.142

h - height of the cone

r - radius of the cone

We are provided with the values of

V - 12

π - 3.142

h - 4

r - ?

Insert the above values into the formula

V = πr^2h/3

12 = 3.142 * r^2 * 4/3

12 = 3.142 * 1.33 * r^2

12 = 4.189r^2

Divide both sides by 4.189

12 / 4.189 = 4.189r^2 / 4.189

2.865 = r^2

r = square root of 2.865

r = 1.6925 inches

r = 1.69 inches