East Battle Lake in Minnesota covers an area of about 1950 acres or 8.5X10^7 square feet and its average depth is about 3.2x10^1 feet. a. Estimate the cubic feet of water in the lake. (hint: Volume=area x average depth.) b. One cubic foot of water equals about 7.5 gallons. How many gallons of water are in this lake?

Answer 1

V=(8.5x10^7)(3.2x10)=2.72x10^10
(2.72x10^10)(7.5)=2.04x10^11 gallons or 204 000 000 000 gallons