Question

hello I'm doing some practice work and would like some help thank you

Answer 1

Answer: 70 bags

First, we will find the area of the path. Let us first get the area of the outer circle, then subtract the area of the inner circle:

$A_{20}=\pi r^2=\pi(20)^2=1256.64$$A_{17}=\pi r^2=\pi(17)^2=907.92$$A=1256.64-907.92=348.72$

Then, we will find out how many bags of sand can cover the path if one path covers 5yd²

Let us round off the area to 350 yd², then divide it by 5 to find how many bags of sand do we need:

$\frac{350}{5}=70$

Therefore, we need 70 bags of sand to cover the path.