Physics for life scince

III) The municipality of New York supplies 2 million cubic metres of water per month to the city of New York. If a household consumes about 30killo-littres of water per month, estimate the number of residents in New York ,assuming that a household has five members on everage.

asked by Simeon
  1. Let N = no. of residents
    N/5 = number of households
    1 cubic meter = 10^6 cubic cm = 1000 liters = 1 kiloliter
    Monthly consumption = (N/5)*30 kiloliter
    = 2*10^6 kiloliter
    This results in N = 1/3 million.
    That is too low. I question the figures you provided.

    According to
    http://www.nytimes.com/2006/10/03/nyregion/03water.html?_r=1
    New York City's daily consumption is 1.1 billion gallons, which would make the monthly consumption 33 billion gallons or 8.5 billion liters or 8.5 million kiloliters, not 2 million.

    posted by drwls

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