Question 53

If two circles touch each other internally. The greater circle has its radius as 6 cm and the distance between the centres of the circles is 2 cm. The radius of the other circle is

Solution

Given : O is the centre of the bigger circle and O' is the centre of the smaller circle.

=> OB = 6 cm and OO' = 2 cm

To find : O'B = $$r$$ = ?

Solution : OB = OO' + O'B

=> $$6=2+r$$

=> $$r=6-2=4$$ cm

=> Ans - (B)

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