help with topic: changing the subject of a formula (1 Viewer)

[lorienne]

would like to know if any one can provide a worked solution to the following:

T = 2pi sqrt [(l) divided by (g)].

am new at this so please forgive is setting out is not what is should be.
cheers
lorienne
ps: have added an attachment should for clarity

 

[Templar]

T=2 Pi Sqrt[l/g]
T/(2Pi)=Sqrt[l/g]
T²/(4Pi²)=l/g
l=T²g/(4Pi²)