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Mathematics 9 Online
OpenStudy (anonymous):

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OpenStudy (anonymous):

Okay... I'm not sure how to set it up, but I'll try.

OpenStudy (anonymous):

To find the lateral area of a cylinder, multiply the circumference (3.14d) by the height (3.14dh). After you have this, you can find the total surface area by adding twice the area of the base (2*3.14r2). (Lateral area = 3.14dh), (Surface area = 3.14dh + 2*3.14r2).

OpenStudy (anonymous):

what is dh? Sorry if that's a stupid question

OpenStudy (anonymous):

one sec

OpenStudy (anonymous):

So would it be 37.7 * 9 and then multiply that by 3.14?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

Formula for lateral surface area of a curved surface = 2* pi * r * h.

OpenStudy (anonymous):

That's 1065.402. How do I change that in terms of pi?

OpenStudy (anonymous):

hears ex Here given that, r = 3.5cm. and h = 10cm. Curved surface area = 2 * 22/7 * 3.5 * 10 = 220 Sq. cm.

OpenStudy (anonymous):

So 2130.804?

OpenStudy (anonymous):

Is 22.7 pi?

OpenStudy (anonymous):

I'm not sure if I'm getting the right numbers

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

Okay so it is supposed to look like 2 * 3.14 * 37.7 * 9?

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