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Spherical Ball

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Source: — Problem Solving |

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Re: Spherical Ball

by Brent@GMATPrepNow » Sat Feb 21, 2009 7:21 pm
hardik.jadeja wrote:OA is D but don't think its right. I think it should be A

Source: IMS Max GMAT
If the equilateral triangle formed were on the plane (i.e. a flat triangle), then A would be the answer. However, the triangle here encloses a portion of the surface area of a sphere. Since there is a bulge in the area, the area will be a little more than the area of a flat equilateral triangle.

That said, I think this question is out of scope. I've certainly never seen a an official GMAT question related to the surface area of a sphere before.
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Re: Spherical Ball

by x2suresh » Sat Feb 21, 2009 10:41 pm
Agree Brent.
Answer is D.
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by hardik.jadeja » Sat Feb 21, 2009 11:27 pm
Thanx Brent. I get it now. The curved surface in the middle of the triangle will increase the area.
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