Find the ratio of the areas of two circles whose radius is 7 cm and 14 cm​

The area of a circle, whose radius is 14 cm, is :

What is the radius of a circle whose area is equal to the sum of the area of two circles whose radii are 20 cm and 21 cm .

Find the area of a circle whose radius is 7cm (ii) 2.1m7km

The area of a circle whose radius is 10 cm is _____.

Area of a circle is the sum of the area of those two circles,whose radius are 5cm and 7cm, respectively.

Find the radius of a circle having area equal to the sum of the areas of two circles with radius 20 cm and 15 cm respectively.

Find the area of the sector of a circle whose radius is 14cm and angle of sector is 450.

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

Find the diameter of the circle whose area is equal to the sum of the areas of two circles having radii 4 cm and 3 cm.