Question

Kirsten used a log to make an umbrella stand. The log was 28 in. tall and had a radius of 7.5 in. Kirsten cut a cylindrical shape, with a radius of 5.5 in., out of the center of the log.

After Kirsten cuts out the cylinder, what is the volume of the remaining portion of the log? Use 3.14 to approximate pi, and express your answer to two decimal places.

_______in^3

Answer 1

@sleepyjess

Answer 2

@sleepyjess

Answer 3

@sleepyjess

Answer 4

http://static.k12.com/calms_media/media/1565500_1566000/1565640/1/5bc2b238e1b24ddfb4dfcab604d3ad0d5ec92a3b/MS_IMC-1401119-110021.jpg

Answer 5

First we need to find the volume of the 7.5 radius log

Answer 6

OKay so 7.5 times 7.5 is 56.25

Answer 7

Ok, now 56.25*28?

Answer 8

1575 :)

Answer 9

Now 1575*3.14

Answer 10

4945.5

Answer 11

Do i round

Answer 12

Next? :)

Answer 13

Or is that it?

Answer 14

@sleepyjess

Answer 15

Find the volume of the 5.5 cylinder

Answer 16

5.5 time s 5.5 = 30.25 and 30.25 times 28 = 847 and 847 times 3.14 = 2659.58

Answer 17

Correct? @sleepyjess :)

Answer 18

Yes, now just subtract 7.5 log - 5.5 log

Answer 19

2.2

Answer 20

2.2???

Answer 21

I mean 2 o.o

Answer 22

how 2? it should be 4945.5-2659.58

Answer 23

you said 7.5 log - 5.5 log

Answer 24

but its 2285.92 for 4945.5 - 2659.58 :) @

Answer 25

@sleepyjess *

Answer 26

yes, the volume of 7.5 log - volume of 5.5 log

Answer 27

subtract them

Answer 28

2285.92

Answer 29

yep :) that is the answer

Answer 30

sorry my bad

Answer 31

:) thank you jessy

Answer 32

it's ok :)

Answer 33

no problem