# Rearranging period of pendulum equation to find length

## Homework Statement

What is
T=2pi[(sqrt)l/g] rearranged for l= ?

## The Attempt at a Solution

Ive tried a few but I just dont know how to do this with sqrt's of a fraction involved.

## Answers and Replies

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Eliminate the square root by squaring both sides.

Ok,so what I end up with after that is l=T^2g/2pi. Which is wrong as its not giving me the correct answer.

TSny
Homework Helper
Gold Member
When you square both sides, don't forget that you also have to square the factor of 2$\pi$