Correct Answer - Option 2 : 102.7 cm

The effective length is given as \({l_{effective}} = l = {l_0} + r\)

\(l = 101.4 + \frac{{2.64}}{2} = 101.4 + 1.32 = 102.72\;cm\)

Since, in addition the least number of decimal figures which occur among the added quantities is to be taken. Hence the number of least decimal figure in the length is 1. Hence,

\(l = 102.7\;cm\)