A circular hole of radius $\left( {{a \over 2}} \right)$ is cut out of a circular disc of radius 'a' as shown in figure. The centroid of the remaining circular portion with respect to point 'O' will be :

Question

${1 \over 6}a$

${2 \over 3}a$

${5 \over 6}a$

${10 \over 11}a$

Solution

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