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Mathematics 25 Online
OpenStudy (anonymous):

A right cylinder has a diameter of 40 mm and a height of 30 mm What is the volume of the cylinder?

OpenStudy (kropot72):

The formula for the volume V is \[V=\pi r ^{2}h\] In this case the radius r = 40/2 and h = 30. So just plug in these values and calculate.

OpenStudy (anonymous):

I get 150,796mm3 and that is not a answer I can choose

OpenStudy (kropot72):

Plugging into the formula gives: \[V=\pi \times 400\times 30=?\] Can you calculate the volume now?

OpenStudy (anonymous):

12,000 ?

OpenStudy (anonymous):

37680 is this in the options

OpenStudy (kropot72):

@Shawna23 But you need to multiply 12000 by pi to get the answer.

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

thats the ans actually u forgot to multiply ur 12000 with pi

OpenStudy (anonymous):

thanks my head is all bunched up with numbers trying to get end of year tests done

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