Answer:
D. Width = x and Length = 3x
Step-by-step explanation:
We are given that,
<em>The length of Box 1 is 3 times the width of Box 1. ..................(1)</em>
Let the width of Box 1 = x
So, from (1), we have,
Length of Box 1 = 3 × Width of Box 1
i.e. Length of Box 1 = 3x
Thus, the dimensions of Box 1 are : Width = x and Length = 3x
Hence, option D is correct.