Centre of mass of a uniform semicircular disc of radius R lies at a distance of:

1. Centre of mass of a uniform semicircular disc of radius R lies at a distance of:

1. $\frac{4R}{3\pi}$ from the flat edge2. $\frac{2R}{\pi}$ from the center3. $R$ from the flat edge4. $\frac{R}{2}$ from the center