Question

Shelly sews a blanket that has an area of 170 square feet. It has 30 square blocks, each the same size. What is the approximate length of each side of a block?

Answer 1

let the length of side of each square block = x ft
then area of one square block = x ft * x ft = x^2 ft^2
area of 30 such square blocks = 30 * x^2 ft^2
Now the total of all 30 blocks should be equal to the area of the blanket
so 30 * x^2 = 170
solve this for x and you get your answer....