Answer
16 ft
Work Step by Step
LA=8(.5)(10)(l)
800=40l
l=20
h$^2$=l$^2$-a$^2$
h$^2$=400-144
h$^2$=256
h=16
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 9 - Section 9.2 - Pyramids, Area, and Volume - Exercises - Page 418: 34
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