Question

A mine equipment room is 40 meters below the surface of the ground. The work area of the 5 times deeper. What is the elevation of the work area?

Answer 1

Answer:200 meters below the surface of the ground.

Explanation:

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Answer 2

The elevation of the work area is 200 meters below the surface of the ground

Explanation:

Let

x -----> the elevation of the work area

y ----> the elevation of a mine equipment room

we know that

The elevation above the surface of the ground is positive

The elevation below the surface of the ground is negative

we have

`y=-40\ m` ---> is negative because is below the surface of the ground

The work area of the mine is 5 times deeper than the elevation of a mine equipment room

so

`x=5y`

substitute the value of y

`x=5(-40)=-200\ m`

therefore

The elevation of the work area is 200 meters below the surface of the ground