Question

Could I please have some help with this question? http://i.imgur.com/t7tmXAm.png

Answer 1

build some equations.

call the amount in litres of A you use A, and call the amount of B you use B.

then see what you know about A & B

Answer 2

you know enough to build 2 equations and solve them

Answer 3

ok, but i'm having troubles with forming these simultaneous equations.

Answer 4

\(\large \color{black}{\begin{align} x+y=500\hspace{.33em}\\~\\
\
\dfrac{18-25}{x}=\dfrac{25-30}{y}
\end{align}}\)

Answer 5

OK,

1) how much liquid in litres will you have in total when you are done?

2) how much acid in litres will you have in total when you are done?

in terms of A & B.

Answer 6

can you please explain the equations @mathmath333

Answer 7

i have used the method of alligation which says that


\(\large \color{black}{\begin{align}
\dfrac{\text{first mixture %}-\text{resulting mixture %}}{\text{amount of first value } }\\
=\quad \dfrac{\text{resulting mixture % }-\text{second mixture % }}{\text{amount of second value }}
\end{align}}\)

Answer 8

https://www.youtube.com/watch?v=x5ycYnbnXy8

Answer 9

look, why not keep this simple because it is simple.

you know how much liquid and how much acid you will have by the end. you can use simple arithmetic to do that -- or you can watch youtube videos all day.

Answer 10

the way i used is simple , just takes time to understand , but after watching that 2 or 3, 20 min videos u can solve any problem immediately

Answer 11

mmm...right, i'll leave you all to it.

Answer 12

i understand that, now that i know that method of alligation, thanks a lot @mathmath333 and @IrishBoy123 !!