Find the volume of a cone with a diameter of 9 inches and a height that is 5 times the radius. Use 3.14 for pi and round your answer to the nearest hundredth. (5 points)
Select one:
a. 47.1 in3
b. 78.51in3
c. 476.89 in3
d. 1430.66 in3

Question

Find the volume of a cone with a diameter of 9 inches and a height that is 5 times the radius. Use 3.14 for pi and round your answer to the nearest hundredth. (5 points)
Select one:
a. 47.1 in3 
b. 78.51in3 
c. 476.89 in3 
d. 1430.66 in3

anonymous · Answer

Just use the formula V = 1/3(πr²)h.

anonymous · Answer

Since diameter is radius doubled,

d = 2r

Since the diameter is 9,

9 = 2r

9 ÷ 2 = 2r ÷ 2

4.5 = r

In this case, height is 5 times the radius, so

h = 5r

r = 4.5

h = 5(4.5)

h = 22.5

Now that you have your values, just plug them into the formula that I gave you. You can figure out the rest. :)