In the measurement of g using a simple pendulum, which quantity should be measured which quantity should be measured with maximum accuracy and why ?

Explanation

In a simple pendulum,
`t = 2pi sqrt((I)/(g))`
`:. G = 4pi^2 (I)/(t^2).` As square of time period t is
involved, any error in measurement of t is
multiplied twice in the final result.
Therefore, t must be measured most accurately.