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The radii of two circles are 19 cm and ...

The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumference of the two circles.

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The correct Answer is:
28 cm
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Knowledge Check

  • If radii of the two concentric circles are 15cm and 17cm, then the length of each chord of one circle which is tangent to other is:

    A
    8
    B
    16
    C
    30
    D
    17

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