A circular hole is cut in a circular disc of diameter 10/3 m so that

A circular hole is cut in a circular disc of diameter 10/3 m so that the weight of the disc is reduced to 1/4 of its original weight. The diameter of the hole is A. \(3*\sqrt 3\) m B. 4.5 m C. 5.4 m D. \(5\sqrt 3\) m E. \(2*\sqrt 4\) (...)