A rotating disc of 1m diameter has two eccentric masses of 0.5 kg each at radi of 50mm and 60mm at angularposition of $$0^\circ$$ and $$150^\circ$$, respectively. A balancing mass of 0.1Kg is to be used to balance the rotor. Whatis the radial position of balancing mass?

A

50mm

B

120mm

C

150mm

D

280mm