Question

The cost of 25 metres of cloth is 5000. Find the cost of 135 metres of cloth.
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Answer 1

The cost of 25m cloth is ₹5000

In this situation the metres of cloth is increasing, so obviously the cost will also increase. Hence, it's a case of direct variation

25          =      135

5000                y2

By crossmultipling,

25 * y2       =         135* 5000

         y2     =    135*5000

                            25

                   = ₹27000

   Hence, the cost of 135metres of cloth is ₹27000