In an experiment to determine the acceleration due to gravity `g`, the formula used for the time period of a periodic motion is `T = 2pisqrt((7(R - r)/(5g)`. The values of `R and r` are measured to be `(60 +- 1)mm and (10 +- 1)mm`, repectively. In five successive measurment, the time period is found to be `0.52s, 0.56s,0.57s,0.54s and 0.59s`. the least count of the watch used for the measurement of time period is `0.01s`. Which of the following satement `(s)` is `(are)` true?

Options

A. The error in the measurement of r is 10%
B. The error in the determined value of g is 11%
C. The error in the measurement of T is 3.75%
D. None of these