Answer:
the height=12; the length=10; the width=4.
Step-by-step explanation:
1) the formula of the described volume is length*width*height=480 (in.³).
2) according to the condition the height=8+width; the length=6+width.
3) if to substitute all the values into the formula, ⇒ (6+width)*(8+width)*width=480.
(width)³+14(width)²+48width-480=0.
4) if to resolve the equation, the width=4.
The length=6+4=10; the height=8+4=12 (in.).
