1dmaster
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| Joined: 21 Aug 2010 |
| Total Posts: 1419 |
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| 24 May 2016 07:34 PM |
Three cylinders have bases that are the same size. The area of the base is 10.0 cm2. Determine the surface area of each cylinder, given its height.
a) 8.0 cm
b) 6.5 cm
c) 9.4 cm
Could you tell me how to do it if you do it. I know all the formulas about Radius and Diameter... Just tell me how you did it and maybe the answer. |
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1dmaster
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| Joined: 21 Aug 2010 |
| Total Posts: 1419 |
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| 24 May 2016 07:36 PM |
| Please help!!! Thanks if you do when I post this. |
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1dmaster
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| Joined: 21 Aug 2010 |
| Total Posts: 1419 |
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| 24 May 2016 07:37 PM |
| I tried everything please help!!!!!!!!!!! |
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kasool
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| Joined: 10 Nov 2007 |
| Total Posts: 53 |
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| 24 May 2016 07:46 PM |
The surface area of a cylinder is 2(pi)r^2 + 2(pi)rh
You are given the heights so that gives you h for each problem.
r is the radius of the circle on the cylinder. Since the bases are all 10.0 cm, you can use the area of a circle formula Area = (pi)r^2 to solve for the radius. Divide 10 cm by pi and take the square to to find that the radius of each cylinder is approximately 1.78 cm.
So all you have to do is plug in 1.78 for r each problem and the respective heights. |
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