The total area of 333 blades of a fan is \dfrac{5}{2}\pi\,\text{m}^2 2 5 πm 2 start fraction, 5, divided by, 2, end fraction, pi, start text, m, end text, squared. Two of the blades form an angle of 30\degree30°30, degree and the third blade forms an angle of 40\degree40°40, degree at the center.

Wesley is making patio from stones of two sizes, 5 inches wide and 10 inches wide. he wants to begin and end his pattern. with a 10-inch so there will be one more of the 10-inch stones than of the 5-inch stone. his patio will be 130 inches wide how many 10-inch stones will wesley need for one row ?