Solve for L
L=\frac{400}{k}
k\neq 0
Solve for k
k=\frac{400}{L}
L\neq 0
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\sqrt{kL}=20
Swap sides so that all variable terms are on the left hand side.
kL=400
Square both sides of the equation.
\frac{kL}{k}=\frac{400}{k}
Divide both sides by k.
L=\frac{400}{k}
Dividing by k undoes the multiplication by k.
\sqrt{kL}=20
Swap sides so that all variable terms are on the left hand side.
Lk=400
Square both sides of the equation.
\frac{Lk}{L}=\frac{400}{L}
Divide both sides by L.
k=\frac{400}{L}
Dividing by L undoes the multiplication by L.
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