1. How many liters of water would be saved if everyone in the United States who
ID: 1828763 • Letter: 1
Question
1. How many liters of water would be saved if everyone in the United States who does not turn off the faucet while they brush their teeth, did so? Assume One-third of people leave water running while bushing.
First, consider the following assumptions. In case of rough estimation, choose the most reasonable number which is closest to your own estimate. Show your work with unit conversions for full credit.
Average number of tooth brushings per person per day is (5, 10, 0, 1).
The population of the United States is (300 million, 75 billion , 75 million, 300 billion)
Average time to bush teeth is (2, 20 , 10 , 0.2) minutes.
Average faucet flow rate is ( 10, 0.2, 20, 2) gal/min.
show ur work and make it clear plz
Explanation / Answer
WATER that can be saved = {(1/3)*poppulation}*(no of brushing per person)*(time to brush)* (flow rate)
unit = (person*(1/person)*minutes*gal/minute) = gal
water saved = {((1/3)*(300*10^6)*5*2*10),((1/3)*(75*10^9)*10*20*0.2), ((1/3)*(75*10^6)*0*10*20),((1/3)*(300*10^9)*1*0.2*2)}
= {10^10,10^12,0,4*10^10} gal
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