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Diameter AB of a circle with centre O is...

Diameter AB of a circle with centre O is produced to point P such that PO = 16.5 cm. PQR is a secant which intersects the circle at Q and R such that PQ = 12 cm and PR = 19.2 cm. The length of AB (in cm) is:
केंद्र O वाले एक वृत्त के व्यास AB को बिंदु P तक इस प्रकार बढ़ाया जाता है कि PO = 16.5 सेमी है | PQR एक छेदक रेखा है जो वृत्त को Q तथा R पर इस प्रकार काटती है कि PQ = 12 सेमी तथा PR = 19.2 सेमी है | AB की लंबाई ( सेमी में ) कितनी है ?

A

15.8

B

14.2

C

15.2

D

14.4

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