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September 22, 2014

September 22, 2014

Posted by **niraj** on Tuesday, August 30, 2011 at 6:33am.

- arithmetic -
**Reiny**, Tuesday, August 30, 2011 at 6:56amnot enough information, you didn't give the height of the prism.

Since the base is a right-angled triange, (9^2 + 12^2= 15^2),

the area of the base is (1/2)(9)(12) = 54 cm^2

Once you know the height h, the total surface area would be

2(54) + 9h + 12h + 15h

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