Diameter AB of a circle with centre O is produced to a point P such that PO = 16.8 cm. PQR is a secant that intersects the circle at Q and R such that PQ = 12 cm and PR = 19.2 cm. The length of AB (in cm) is:

Diameter AB of a circle with centre O is produced to a point P such th

1.	Diameter AB of a circle with centre O is produced to a point P such that PO = 16.8 cm. PQR is a secant that intersects the circle at Q and R such that PQ = 12 cm and PR = 19.2 cm. The length of AB (in cm) is:
A.	14.4
B.	15.2
C.	14.2
D.	15.8
Answer» B. 15.2

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Diameter AB of a circle with centre O is produced to a point P such that PO = 16.8 cm. PQR is a secant that intersects the circle at Q and R such that PQ = 12 cm and PR = 19.2 cm. The length of AB (in cm) is:

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