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Two chords AB and CD of a circle are produced to intersect each other at point P outside the circle. If AB=7 cm, BP = 4.2 cm and PD = 2.8 cm, then the length of CD is: /
एक वृत्त की दो जीवाओं AB और CD को बढ़ाया जाता है जो एक-दूसरे को वृत्त के बाहर बिंदु ? पर काटती हैं| यदि AB = 7 सेमी, BP = 4.2 सेमी तथा तथा PD = 2.8 सेमी है, तो CD की लंबाई कितनी है ?

A

12 cm

B

14.6 cm

C

15.8 cm

D

14 cm

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