Question

What is the exact volume of the cone? (height is 9 cm, the radius is 15 cm)

Answer 1

D is the answerr to the first one.

Answer 2

1: Exact volume of cone =  r^2 * h/ 3 =  15^2 * 9 / 3 =    225 * 9=  2025/3 = 675

2: Approximate volume of cone: pi* r^2 * h / 3 =  3.14 * 10^2 * 9/3 = 3.14 * 100* 9/3 =   3.14 x 900 / 3   = 2826/3 = 942 cm^3

3:  Asks for the same as problem above, but we have to divide the diameter by 2 to get the radius first 10/2=5 now we can solve. : 3.14 * 5^2 * 5/3 =   3.14 * 25 * 5/ 3 =  3.14 * 125 / 3  = 392.5/ 3 = 130.8 m^3

The exact volume does not use pi: so that is why the first one is 675
The Approximate used pi or 3.14.