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The radii of two circles are 19 cm and 9...

The radii of two circles are 19 cm and 9 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:
28cm
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Knowledge Check

  • Radii of two circles are 5 cm and 3 cm respectively and the distance between their centres is 6 cm.

    A
    Touching externally
    B
    Intersecting circles
    C
    Touching internally
    D
    Concentric circles.

  • The diameter of a circle whose area is equal to the sum of the areas of the two circles of radii 40 cm and 9cm is

    A
    62cm
    B
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    C
    49 cm
    D
    82 cm

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