Question

A rectangular garden of 10m by 16m is surrounded by concrete wall of uniform width.The area of the wall is 120 m square.Find the width of the wall.

Answer 1

This is my answer but I am not sure the answer is correct or not
here is it
10 m by 16 m
perimeter of the rectangular garden 10+10=20+16+16=32 =62
now
$\frac{120}{62}$
1.935