If the area of a circle is 154 cm^{2}, then its perimeter is
The radii of two circles are 4 cm and 3 cm respectively. The diameter of the circle having area equal to the sum of the areas of the two circles (in cm)
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If the circumference of a circle and the perimeter of a square are equal, the
The perimeter (in cm) of a square circumscribing a circle of radius a cm, is
The perimeter of a circle is equal to that of a square, then the ratio of their areas is
If the area of a circle is numerically equal to twice its circumference, then the diameter of the circle is
The area of the circle that can be inscribed in a square of side 6 cm is
The diameter of a wheel is 1.26 m. The distance travelled in 500 revolutions is
The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm is
If the sum of the circumferences of two circles with radii R_{1} and R_{2} is equal to the circumference of a circle of radius R, then
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116 videos420 docs77 tests
