If the length of the simple pendulum is increased by 44% then what is the change in time period of pendulum

Time period of a pendulum is given by the formula, T= 2pi * sqrt(l/g)

So if the length is increased by 44% i.e l’= 1.44l

The new time period, T’=2pi *sqrt(1.44l/g) = 2pi *1.2 * sqrt(l/g)

So the new time period is 1.2 times of the old one or you can say it increased by 20%.

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