The percentage error in measuring M, L and T are 1 \%, 1.5 \% and 3...

( Let $X=$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-1}\right]$Percentage error in$X$is$\frac{\Delta X}{X} \times 100=\left(\frac{\Delta M}{M}+\frac{\Delta L}{L}+\frac{\Delta T}{T}\right) \times 100$Here,$\frac{\Delta M}{M} \times 100=1 \%, \frac{\Delta L}{L} \times 100=1.5 \%$and$$\begin{aligned} & \frac{\Delta T}{T} \times 100=3 \% \\ & \therefore \quad \frac{\Delta X}{X} \times 100=1 \%+1.5 \%+3 \%=5.5 \%\end{aligned}$$