Answer
x=3 cm
Work Step by Step
A=2lw+2lh+2wh
94=2(x+2)(x)+2(x+2)(4)+2(4)(x)
94=2x$^2$+4x+8x+16+8x
94=2x$^2$+20x+16
47=x$^2$+10x+8
x$^2$+10x-39=0
(x+13)(x-3)=0
x=3
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 9 - Section 9.1 - Prisms, Area, and Volume - Exercises - Page 412: 23
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