So in Math Day Quiz Part Two, how much money do we lose overall when you subtract the cost of the dental work from the money saved by not running the tap for more than ten seconds?

]]>60/16=3.75 x 2 litres is 5,475 litres annual usage

10 seconds usage = 10/16×100/1=62.5%

62.5% of 2 litres is 1.25 litres

1.25 x 2 x 365= 912.5 new usage

SAVING 5475-912.5= 4,562.50 Litres

]]>*Shudders*

]]>2 litres in 16 seconds is .125 litres a second. That’s 7.5 litres in the 60 seconds he normally left it on. But now he uses only 10 seconds worth (1.250 litres) so his saving is 6.25 litres twice a day = 12.5 litres…. do that 365 days of the year (presuming its not a leap year!) and that’s well…. I’ll leave you to do the maths on that bit :)

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