16-02-2015
Mathematics

Answered

The surface area of a triangular pyramid is 305 squarei nches.The area of the base is 35 square inches. Each face has a base of 9 inches. What is the slant height?

Verified Answer :

crisforp crisforp

17-02-2015

305 = 35 + 3 [( 9 s) / 2] ; where s = the slant height ;
270 = 3 [( 9 s) / 2] ;
90 = ( 9 s ) / 2 ;
180 = 9 s ;
s = 20 inches.

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