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So I have this homework question I need help on.

There's this rectangular garden that is said dimension ($x \times y$). Someone orders said amount of cement ($c^3$) and wants to make a border of uniform width. If the border is going to be said depth ($d$), how wide should the border be?

I am given the dimensions of the garden, the amount of cement going to be used, and the depth. How would I go to tackling this problem?

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    First let the unknown border width be $w$. Calculate the area of the border in terms of $w$. To do this, you will need to split up the border into some rectangles whose dimensions you know, and then add all the areas up. Second step: if this area is $A$ and the depth is $d$, then how much cement would you need?2011-09-14
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    @Srivatsan, you might consider elevating your comment to an answer.2011-09-14

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