Answer
$6.75ft$
Work Step by Step
We know that
$26=d+d+12.5$
$\implies 2d=26-12.5$
$2d=13.5$
$d=\frac{13.5}{2}$
$d=6.75ft$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 26 - Geometrical Optics - Problems and Conceptual Exercises - Page 940: 10
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