SOLUTION: How many inches long is the altitude of a regular triangular pyramid the base of which is 12 inches on a side and its volume is 103.8 cubic inches? Round off the answer to the near

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Question 1198240: How many inches long is the altitude of a regular triangular pyramid the base of which is 12 inches on a side and its volume is 103.8 cubic inches? Round off the answer to the nearest integer.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
.
V = 1/3 bh = 103.8in^3 (b is the area of the base)
Given: the base of which is 12 inches on a side: b = 144in^2
%28144in%5E2%29%2Ah+=+3%28103.8in%5E++++3+%29
h = %28311.4in%5E3%29%2F%28144in%5E2%29 = 2.1625in
0r
h= 2in (nearest integer)