If the sum of the areas of two circles with radii `R_(1)` and `R_(2)` is equal to the area of a circle of radius R, then

Express R_(3) in terms of R_(1) and R_(2) , where the sum of areas of two circles with radii R_(1) and R_(2) is equal to the area of the circle of radius R_(3) .

Express R_(3) interms of R_(1) and R_(2), where the sum of areas of two circles with radii R _(1) and R_(2) is equal to the area of the circle of radius R_(3).

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

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

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

The area of a circle with radius 13cm is equal to the sum of the areas of circles with radii 3cm,4cm and R. Find R. Find the area of the circle with radius 'R'.

Find the area of a circle of radius r, by integration.

Answer the following by a number or a word or a sentence : If the area of a circle with radius r is same as the sum of areas of two circles with radii r_(1) and r_(2) . Find the relation between r, r_(1) and r_(2) .

The area of a circle is equal to the sum of the areas of two circles of radii 24 cm and 7 cm. The diameter of the new circle is