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Mathematics 15 Online
OpenStudy (love_333):

Medal + Fan! I want a walk through and answer, not just the answer. What is the height of this cylinder? A 18in B 11.3in C 7.2in D 3.6in

OpenStudy (love_333):

OpenStudy (love_333):

@Mehek14 Do you happen to know how to work this?

Mehek (mehek14):

Formula = \(\pi r^2h\\ \pi * 5^2 * h = 282.7\)

OpenStudy (marcelv):

You have to remember that the volume of the cylinder is the area times the height, since the area of the circle is given by pi times r^2, and the height is just h, we have \[ V = \pi r^2h\] From there you can replace the values of V and r, and solve for h, you will have \[h = \cfrac V{\pi r^2}\]

Mehek (mehek14):

First find \(\pi *5^2\)

OpenStudy (love_333):

That would be 25pi

Mehek (mehek14):

Yes You can make that 25 * 3.14 = ?

OpenStudy (love_333):

78.5

Mehek (mehek14):

Divide that with the volume 282.7/78.5 = ?

Mehek (mehek14):

This will give you the height

OpenStudy (love_333):

3.6 is the height?

Mehek (mehek14):

Yes :)

OpenStudy (love_333):

Thank you :)

OpenStudy (love_333):

Could you see if you know my next question? @Mehek14

Mehek (mehek14):

Yw and sure :)

OpenStudy (love_333):

Find the volume of the composite space figure (below) to the nearest whole number. A 210cm^3 B 180cm^3 C 120cm^3 D 60cm^3

OpenStudy (love_333):

Mehek (mehek14):

3 * 8 * 5 = ? 2 * 5 * 6 = ? Then add those two

OpenStudy (love_333):

120+60 = 180 :) thx

Mehek (mehek14):

yw :)

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