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Help Please Math please

[From: ] [author: ] [Date: 12-02-02] [Hit: ]
Let h be the slant height.(1/2) x 9 x h = 67.......
The surface area of a triangular pyramid is 305 square inches. The area of the base is 35 square inches. Each face has a base of 9 inches. What is the slant height?

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First find the surface area of 4 triangle.
So it will be,
Surface area of 4 triangle = 305-35
=270

Area of 1 triangle = 270 / 4
= 67.5

Using (1/2) x b x h to find the slant height
So,
Let h be the slant height.

(1/2) x 9 x h = 67.5
h = 15

:D
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