Answer:
5 cm
Step-by-step explanation:
It is given in the question that height and width of the orange juice box are related as:
[tex]h=\frac{500}{w^{2}}[/tex]
We have to find the width when h=20 cms
[tex]20=\frac{500}{w^{2}}[/tex]
[tex]w^{2}=\frac{500}{20} =25 (cm)^{2}[/tex]
∴w=±5 cm
But width cant be negative,hence w=5 cm.