Question

Find the volume and surface area of the composite figure. Give your answer in terms of π.

Answer 1

I feel like I did something similar to this, but my guesses don't feel right.

Answer 2

@Directrix Mind helping? If not it's fine.

Answer 3

This looks familiar.

First up: Find the volume of the right circular cone.

Second up: Find the volume of the hemisphere.

Answer 4

Yeah I was thinking so. I looked back in a previous assignment, the numbers are different for this one.

Answer 5

I got 724 for area of cone when I did it on paper.

Answer 6

The formulas don't change.

Did you get the volume of the hemisphere?

You could find the volume of a sphere of radius 7 and then take half of that to get the volume of the associated hemisphere.

Answer 7

1,282

Answer 8

half is 641

Answer 9

That's volume?

Answer 10

Let me see what I get for the lateral area of the cone.

LA = pi * r * L where L is the slant height

LA = pi * 7 * 25

LA = 175 π

Answer 11

549?

Answer 12

LA of hemisphere:

2 π 7*7 = 98 π

Answer 13

98 π + 175 π =

Answer 14

273 π for surface area.

Is that an option?

Answer 15

I got 857.65

Answer 16

Give your answer in terms of π.

Answer 17

Yeah. It shows. I got the volume of it, area I wasn't sure, but it shows 273pi

Answer 18

Danke. :)

Answer 19

Want me to close this?

Answer 20

I am just now calculating volume. You've already done that?

Answer 21

It doesn't show another area to ask a question though. It says I've had to many questions open, and not allowed to post anymore?

Answer 22

Not allowed to post on OpenStudy? I don't know what you are saying.

Answer 23

Yeah volume I had multiplied. I'm pretty sure I got it right.

Answer 24

Yeah, on the home page, it shows "unavailable postage"

Answer 25

oh ok

Answer 26

Close this thread and you will be allowed to post your new question.

Answer 27

for the volume btw, i got 615.6

Answer 28

Closest to it is 620, so close enough in my opinion.

Answer 29

Um... not letting me close this?