Let OM and ON be perpendiculars drawn from the centre O of a circle to chords AB and CD respectively. If AB= 10 cm, then CD= .
In the given figure, BOC is a diameter of a circle with centre O. If AB and CD are two chords such that AB||CD and AB = 10 cm then CD = ?
(a) 5 cm
(b) 12.5 cm
(c) 15 cm
(d) 10 cm