A wire frame in the shape of an equilateral triangle is hinged at one vertex so that it can swing freely in a vertical plane, with the plane of the Δ always remaining vertical. The side of the frame is 1/√3 m.The time ** in seconds of small oscillations of the frame will be
(A) π/√2
(B) π√2
(C) π/√6
(D) π/√5
