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Rekha

· started a discussion

· 1 Months ago

problem solving (Question: 463276.0 )

AO=2 how??? i cant understand...plz explain..

Question:

Two circles with centres A and B of radius 10 cm and 6 cm respectively touch each other internally. If a tangent to smaller circle at O meets bigger circle at P and Q, then the value of PQ is:

Options:
A)

46    

B)

6

C)

86    

D)

2 3   

Solution:

Ans: (c)


Knowledge Expert

· commented

· 1 Months ago

Dear student
We have updated the figure
and here is the explanation -
PA = RA (radius 10 cm)
BS = OB (radius 6 cm)
RA - RO = OA
10 - (20 - 12) =2 cm
(where RO = RS - OS)

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