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Posted by **sarika** on Tuesday, December 4, 2012 at 9:22am.

- maths --plse help me.. -
**Steve**, Tuesday, December 4, 2012 at 11:14amhemisphere: a = 2pi r^2

cone: a = pi r s

cylinder: a = pi r^2 h

total area:

2 pi * 5^2 + pi * 5 * 13 + pi * 5^2 * 13 = 440pi

- maths --plse help me.. -
**sarika**, Tuesday, December 4, 2012 at 12:00pmwhere is the height of conical point = 12cm used..

- maths --plse help me.. -
**Steve**, Tuesday, December 4, 2012 at 12:15pmonly used in determining the slant height (s) of the cone. 5^2+12^2 = 13^2

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