\(9 \times 1\, {mm}=10\, {VSD}\)
\(\therefore 1 \,{VSD}=0.9\, {mm}\)
\({LC}=1\, {MSD}-1\, {VSD}=0.1 \,{mm}\)
Reading \(={MSR}+{VSR} \times {LC}\)
\(10+8 \times 0.1=10.8\, {mm}\)
Actual reading \(=10.8-0.4=10.4\, {mm}\)
radius \(=\frac{{d}}{2}=\frac{10.4}{2}=5.2 \,{mm}\)
\(=52 \times 10^{-2}\, {cm}\)