Hi, can i have help with this please

10 You have carried out an experiment to investigate the effect of the length of a pendulum on the time period of oscillation. Theory says that the pendulum should follow the rule L T = 2n 9 Where T is the time period (seconds) L is the length of the pendulum (metre) G is the acceleration due to gravity (g = 9.81 m/sZ) Calculate the expected percentage error in the time period calculation if your measurement of length is X% high