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Standard VII
Mathematics
Area of a Circle
Question

Two circles touch internally. The sum of their areas is 116π sq. cm and the distance between their centers is 6 cm. The radii of the given circles are
  1. 8cm & 20cm.
  2. 4cm & 10cm.
  3. 6cm & 8cm
  4. 5cm & 9cm.

A
4cm & 10cm.
B
5cm & 9cm.
C
6cm & 8cm
D
8cm & 20cm.
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Solution
Verified by Toppr

Given−Twocirclestouchinternally.Thedistancebetweentheircertres=6cm.Theradiioftheouter&innercirclesarer2&r1respectively.Thesumoftheirareas=116π.

Tofindout−(r2&r1)=?

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