Question

Mr Townes created a 2foot wide garden path around a circular garden. The radius of the garden is 7 feet. He wants to cover the path in stones. If mr. Townes needs 1 bag of stones for every 5 square feet of path, how many bags of stones will he need to cover his garden path?

Answer 1

area path= area outer-area inner
= PI (9^2 - 7^2)= PI*(81-49) figure that out.

Now, bags of stones=1bag/5 * area

Answer 2

50.9

Answer 3

81 pi - 49 pi = 32pi sq. ft . or 100.48 sq. ft.
Mr. Townes will need 21 bags of stone to be sure to cover his garden path