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The length of a common internal tangent to two circles is 7 and a common external tangent is 11. If the product of the radii of the two circles is , then the value of  is


Question ID - 153539 | Toppr Answer

The length of a common internal tangent to two circles is 7 and a common external tangent is 11. If the product of the radii of the two circles is , then the value of  is

1 Answer - 5876 Votes

3537

Answer Key : (9) -

(9)

From the figure    (1)

From the figure

           (2)

From (1) and (2),



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