Problema Solution
Mrs. Harris is weaving a circular rug. The
diameter of the rug is 12 feet. The yarn she
is using comes in bundles. She can weave 10
square feet with 1 bundle of yarn.
How many bundles of yarn does Mrs. Harris
need to weave her rug? Let π ≈ 3.14.
Answer provided by our tutors
let
d = 12 ft the diameter of the circular rug
π ≈ 3.14
A = (d/2)^2*π is the are of the rug
A = (12/2)^2*3.14
A = 113.04 ft^2 the total area of the rug
for each 10 ft^2 of the rug she needs 1 bundle of yarn thus for 113.04 ft^2 she will need 113.04/10 = 11.304 bundles of yarn.
if the number of bundles of yarn must be integer (if you can not divide the bundles) then she will need 12 bundles of yarn.