ahhh brilliant thanks guys.
changing my mistake i get:
2 * 784000 = 250n + 200n2
giving:
0 = 200n2 + 250n - 1568000
then applying to a quadratic equation i get 87.921, not quite 88.3 but then I am assuming that 1 cubic metre of water = 1000 litres.
thanks again that confused...
the problem I am having now is although there's only 1 variable (n) there's 2 of them, and i need to get only 1 for the answer.
this is what i tryed:
S= n/2 (a+(a+(n-1)d))
2S = n (150+(150+(n-1)200))
2S = n (150+150+200n-200)
2S = n (150+(200n-50)
2S = n (100+350n)
2S = 100n+350n2
not sure if...
not entirely, i attempted to replaced l in the 2nd equation to the answer for l in the first to give:
S= n/2 (a+(a+(n-1)d))
but i couldn't seem to get a decent answer from that
Homework Statement
water fills a tank at a rate of 150 litres during the first hour, 350 litres during the second hour, 550 litres during the 3rd hour and so on. find the number of hours neccesary to fill a rectangular tank 16m x 7m x7mHomework Equations
l=a+(n-1)d
S= n/2 (a+l)
where:
l =...
ahh brilliant I am with you now, thanks for the help.
for some reason i didnt think it would be possible to calculate due to the temperature changing and trying to calculate it from that. looking back i actually wrote that equation down about 3 hours ago and crossed it out before i tied...
hi thanks for the welcome.
been thinking about this and with the equation posted if i knew both P and V at a given point then there would be no need to use the equation as id already have the volume at the given point. unless of course the constant at 1 point of volume was the same at...
trying to work through the exercise sheets that were given to us to prepare for exams when term starts up but I've come to a complete stop on this question and the following questions all seem to be based around it so i need your help!
Homework Statement
a certain gas occupies a bolume of...