Step-by-step answer:
There are two squares, the inner one of which is a garden, surrounded by a path 1 foot wide.
The outer square represents the periphery of the path, as shown in the attached image.
One bag of gravel covers 8 square-feet. Need the number of bags required to cover the path.
Solution:
We first need to find the total area of the path by subtracting the area of garden from the overall area, namely the outer square.
Area of path = 12^2 - 10^2 = 144-100 = 44 sq. ft.
Number of bags required
= area (sq.ft) / area each bag covers
= 44 sq.ft / 8 (sq.ft / bag)
= 5.5 bags
Answer: 6 bags need to be purchased.