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Question -

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



Answer -

If the number of bottles is increased then the required number of boxes will be decreased. Thus the two quantities are in inverse proportion.

Number of boxes

Number of bottles per box

25

12

x

20

Let the requirednumber of boxes be x.
x1y1 = x2y2
25 × 12 = x × 20
x = 15
Hence, the required number of boxes = 15.

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