Step-by-step explanation:
Let the length of shoe box A be 2x and the length of shoe box B be 3x
Given that the length of shoe box A is 10 inch and the width is 6 inch.
Therefore 2x = 10
⇔ x = 5
Therefore the length of box B is = (3×5) inch = 15 inches
Therefore the perimeter of box B is =(10+6) inches =16 inches.[box A and box are similar]