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

Ans. 1 acre = 4046.86 m²

1 inch = 0.0254 m

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.