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AB and CD are two parallel chords of a circle with centre O such that Ab=6 cm and CD=12 cm.The chords are on the same side of the centre and the distance between them is 3 cm.The radius of the circle is? (a) 6 cm (b) 5*2^1/2 cm (c) 7 cm (d) 3*5^1/2 cm

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Bhaji calculation wala sum na pao mera g naio karda kadhan nu;-P