Question

The formula=A+2lh+2wh gives surface area a. Of a rectangler solid with length, width, and height, L,W, and H, respectively solve the formula for L

Answer 1

`l= (A)/(2h) -w`

Explanation:

The question is not correct (particularly the expression for the area)

A=2lh+2wh

Now we are expected to solve for l, that is we are going to make l subject of the formula, we have

let us take the second term on the RHS to the LHS

`A-2wh= 2lh`

we can now divide both sides by 2h we have

`(A-2wh)/(2h) = l\\\\l=(A)/(2h) -(2wh)/(2h) \\\\l= (A)/(2h) -w`

hence the expression for the length is
`l= (A)/(2h) -w`