question_answer 17)

                A batch of bottles were packed in 25 boxes with 12 bottles in each box. If the same packed using 20 bottles each box, how many boxes would be filled?

Answer:

                Suppose that x boxes would be filled. We have the following table.

Number of bottles	12	20
Number of boxes	25	\[x\]

  Lesser the number of bottles, more will be number of boxes required to be filled. So, this is a case of inverse proportion. Hence, \[2\times 25=20\times x\] \[\Rightarrow \]               \[x=\frac{12\times 25}{20}\] \[\Rightarrow \]               \[x=15\] Hence 15 boxes would be filled.