 # Question & Answer: How many gallons of water is there if 1.75 inches of rain falls on an acre of property? If a…..

How many gallons of water is there if 1.75 inches of rain falls on an acre of property? If a person were to drink 1.25 gallons of this water daily, how many years would it take consume all that rain water?

Ans. 1 acre = 4046.86 m2

1 inch = 0.0254 m

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Rainfall = 1.75 in = 1.75 x (0.0254 m) = 0.04445 m

Volume of rain water = surface area x rainfall in m

= 4046.86 m2 x 0.04445 m

= 179.88293 m3

= 179.88293 x (264.17 gallon)                    ; [1m3 = 264.17 gallon]

47519.67 gallons

Now,

No. of day rainwater to be consumed = Total rainfall water / dater consumption per day

= 47519.67 gallons / (1.25 gallon/ day)

= 38015.74 day

104.15 years                                             ; [1 year = 365 days]

Therefore, the rainwater can run for 104.15 years.