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#1 2008-05-12 05:36:30
- atut
- Member
- Registered: 2008-04-23
- Posts: 30
Help!!! Math Problem
A cylindrical has radius 6.7 cm. and thickness 4 mm.
Caculate the new volume of the of the disc after the radius is increased by 20% and the thickness is reduced by 25%. Write your answer to 1d.p. (decimal place)
Thanks very much . Hope you can reply!
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#2 2008-05-12 06:07:44
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: Help!!! Math Problem
The new radius is 6.7 x 1.2 = 8.04cm
The new thickness is 4 x 0.75 = 3mm = 0.3cm
Therefore, the new volume is π x 8.04² x 0.3 ≈ 60.9 cm³.
Why did the vector cross the road?
It wanted to be normal.
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#3 2008-05-13 05:25:01
- atut
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- Registered: 2008-04-23
- Posts: 30
Re: Help!!! Math Problem
thank u now I understand it kk
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#4 2008-05-14 02:31:38
- Danna hunter
- Member
- Registered: 2008-05-14
- Posts: 0
Re: Help!!! Math Problem
How to determine the bearings on a scale map
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