Ally is wearing a witch’s costume for Halloween. Her hat is in the shape of a cone with a diameter of 9 inches and a height of 14 inches. What is the volume of Ally’s hat? Use for pi.

382 in3

297 in3

1,188 in3

891 in3

Question

Ally is wearing a witch’s costume for Halloween. Her hat is in the shape of a cone with a diameter of 9 inches and a height of 14 inches. What is the volume of Ally’s hat? Use  for pi.

 382 in3

 297 in3

 1,188 in3

 891 in3

across · Answer

Do you know the formula for the volume of a cone? That's all you need to solve this question.

anonymous · Answer

I got 65.84

across · Answer

That's none of your answer choices.

The volume of a cone is$$V=\frac{1}{3}\pi r^2h.$$Plugging in, you get$$V=\frac{1}{3}(4.5)^2(14)\approx297.$$

anonymous · Answer

Hm... I think I forgot to square root the 4.5 , thanks so much!

across · Answer

That is not a square root, just a square, and you're welcome. :)