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Mathematics 16 Online
OpenStudy (anonymous):

Find the volume of a cone with radius = 3 m and height = 10 m. Round your answer to the nearest m3. Choose one answer. a. 30 m^3 b. 90 m^3 c. 94 m^3 d. 283 m^3

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

Area of the base = ???

OpenStudy (anonymous):

with area of a circle do i use pi?

jimthompson5910 (jim_thompson5910):

|dw:1354916030577:dw|

jimthompson5910 (jim_thompson5910):

yes all circle equations use pi

jimthompson5910 (jim_thompson5910):

do you know the area of a circle formula?

OpenStudy (anonymous):

is it 28.26?

jimthompson5910 (jim_thompson5910):

close enough, now multiply this by the height

OpenStudy (anonymous):

oh A=pi*r^2 right?

jimthompson5910 (jim_thompson5910):

yes

OpenStudy (anonymous):

k

OpenStudy (anonymous):

282.6

OpenStudy (anonymous):

283

jimthompson5910 (jim_thompson5910):

now divide this by 3

OpenStudy (anonymous):

oh 94.2

OpenStudy (anonymous):

or 94

jimthompson5910 (jim_thompson5910):

a cone is a pyramid (a special type of pyramid---with a circular base)

jimthompson5910 (jim_thompson5910):

yep

OpenStudy (anonymous):

thank you soo much!!

jimthompson5910 (jim_thompson5910):

np

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