Multiple choice

A disc of radius r has a hole of radius $\frac{r}{2}$ cut out as shown. The centroid of the remaining disc (shaded portion) at a radial distance from the centre “O” is

  1. $\frac{r}{2}$
  2. $\frac{r}{3}$
  3. $\frac{r}{6}$
  4. $\frac{r}{8}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 

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