Question

There are two types of jar. In the 1st jar the ratio of copper and aluminium is 1:2 and in the 2nd Jar is 1: 4. In what ratio these two jar should be mix to make 3rd jar In which the ratio of copper & aluminium become 1:3?

Answer 1

Let the required ratio of first to second type be $1:x$

According to question $\frac{1\times \frac{1}{3}+x\times \frac{1}{5}}{1\times \frac{2}{3}+x\times \frac{4}{5}}=\frac{1}{3}$

On solving we get $x=\frac{5}{3}$

So required ratio of first to second type = $3:5$