Geometry
posted by George on .
A flush tank on a toilet is rectangular with dimensions of 21 inches by 6.5 inches and contain water to a depth of 12 inches. How many gallons of water per flush will be saved if the depth of the water is reduced by onethird? 231 cubic inches per gallon)

gallons saved= 1/3 (21*6.5*12)/231

2.36 gallons. Correct?