Answer
$w=5.9$ feet
$l=17.7$ feet
Work Step by Step
$$V=lwh$$
$$315=3w(w)3$$
$$315=9w^2$$
$$w^2=315:9$$
$$w^2=35$$
$$w=\pm \sqrt{35}$$
Take the positive value
$$w=\sqrt{35}\approx 5.9\text{ feet}$$
$$l=3w=3\sqrt{35}\approx 17.7\text{ feet}$$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 9 - Solving Quadratic Equations - 9.3 - Solving Quadratic Equations Using Square Roots - Monitoring Progress - Page 500: 10
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