An unopened cereal box contains 15/28 cubic foot of cereal. if the box is full, and the length and height of the box are5/7 and 1 1/2 feet, respectively, what is the width of the box?

Volume is height times length times width

V = 15/28 ft^3
h = 11/2 ft
l = 5/7
w = ?

So the unsolved equation is:
V = h × l × w

Separate the w by diving both sides by h and l:

Then plug in the numbers:

Which, with the fractions flipped, equals:


The width of the box is 3/22 ft