The faucet in my bathroom sink drips one drop every two seconds. If it takes 575 drops of water to fill a 100-ml bottle, how many liters of water are being wasted in a week? A month? A year?
First we note that 5750 drops of water make 1 liter.
One week: The number of seconds in 1 week is 7(24)(60)(60) = 604,800. We divide by 2 and then by 5750 to get 52.591 liters of water wasted in a week.
One month: The number of seconds in a 30-day month is 30(24)(60)(60) = 2,592,000. Again we divide by 2 and then by 5750 to get 225.391 liters of water wasted in a 30-day month.
One year: The number of seconds in a 365-day year is 365(24)(60)(60) = 31,536,000 or 2,742.261 liters of water wasted in a 365-day year.