Problema Solution
A hot air balloon is in the shape of a sphere. Approximately how much fabric was used to construct the balloon if its diameter is 22 ft? Round to the nearest whole number.
Answer provided by our tutors
We need to find the area of a sphere with diameter D = 22 ft.
R = D/2, is the diameter
A = 4R^2pi
A = 4(22/2)^2*pi
A = 4*11^2*pi
A = 484pi
A = 484*3.14
A = 1,519.76 ft^2
A = 1,520 ft^2 to the nearest integer
The area of the fabric needed is 1,520 feet square.