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Two circles touch internally and their c...

Two circles touch internally and their centres are O and Oc as shown. The sum of their areas is 180`pi` sq. cm. and the distance between their centres is 6 cm.

What is the diameter of the larger circle ?

A

a) 16 cm

B

b) 12 cm

C

c) 18 cm

D

d) 24 cm

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The correct Answer is:
D
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