Question

the length of a garden is 250m breadth is 200m.A trench was dug around it outside. the width is 2and half m and depth 2m.the earth dug out was spread out uniformly over it. find the rise in the level of the graden​

Answer 1

Answer:

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Step-by-step explanation:

W, to represent the side of fencing parallel to the 4th side or backyard fence.

Since we know we only have 80 feet of fence available, we know that

L + W + L = 80, or more simply, 2L + W = 80. This allows us to represent the width, W, in terms of L: W = 80 – 2L

Now we are ready to write an equation for the area the fence encloses. We know the area of a rectangle is length multiplied by width, so

A = LW = L(80 – 2L)

A(L) = 80L – 2L2

This formula represents the area of the fence in terms of the variable length

L.