Predict the result Find a cylinder height for volume 1570 cubic feet and radius five feet, using pi about 3.14. Set up the model Use volume equals pi times radius squared times height. Substitute the stated values and isolate height. Work the example The equation becomes fifteen hundred seventy equals seventy eight point five times height. The cylinder height is twenty feet under the stated approximation. Check the result For a cone with volume 5966 cubic feet and radius ten feet, find height using pi about 3.14. Take eight seconds to think before the answer appears. [Eight-second silent pause to work; the answer remains hidden.] Using three times volume over pi times radius squared gives approximately fifty seven feet. Interpret the result A height is measured in feet; cubic feet measure volume.