A water storage tank has the shape of a cylinder with diameter 14 ft. It is mounted so that the circular cross-sections are vertical. If the depth of the water is 13 ft, what percentage of the total capacity is being used? (Round your answer to one decimal place.)

Question

anonymous · Answer

The capacity is proportional to the circular cross section area of the cylinder.
The percentage of the total capacity is comparing the area of the circle with water to the whole area πr², which is 9π.

anonymous · Answer

sorry i think it should be 11π.