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Question

6 note-books cost 156. Find the cost of 54 such note-books.

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Solution

Framing the table for given information

Let the cost of 54 note-books be x.

Framing the table for given information:
Number of notebooks 6 54
Cost (in ₹) 156 x

Let x1=6 and x2=54

y1=156 and y2=x

Solve using direct variation relation

Here, number of books and cost of notebooks are forming direct variation.

x1y1=x2y2

6156=54xx=54×1566

x=156×9= 1404

Therefore, the cost of 54 such note-books is 1404.

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