Calculate the error!

Calculus Level 3

The time TT of a complete oscillation of a simple pendulum of length ll is given by:

T=2πlgT =2\pi \sqrt { \dfrac { l }{ g } }

where gg is a constant.

Find the approximate error in the calculated value of TT corresponding to an error of 2%2\% in the value of ll

The answer is x%x\%

Find xx

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