The cost of fencing a rectangular field at 25 per metre is 2400 if the breadth is field is 18 cm its length will be
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Hey there!
They have given the total cost, which is Rs. 2400, and they have also given the rate per meter, which is Rs. 25.
We know that perimeter × rate = total cost
So, we can find the perimeter easily by substituting the values:
We got the value of the perimeter. Do you remember that there is a formula for perimeter also? It is the following:
Simply substitute the values! It will be solved like this:
Rearranging it will give this:
We know that , so if we put it in this equation:
There you go! The length of the field is 30m.
Important points/concepts to remember:
- Formula of perimeter of a rectangle
- Perimeter × rate per meter = total cost
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