If the perimeters of a circle and a square are same, then the ratio of their areas is :

1. 2 : π

2. 4 : π

3. 16 : π

4. π : 4

The radius of the circle whose area is equal to the sum of areas of two circles of radii 9 cm and 12 cm respectively is :

1. 11 cm

2. 12 cm

3. 14 cm

4. 15 cm

The area of a circular garden is 55.44 m². How long wire is needed for fencing the garden ?

1. 21.4 m

2. 22.4 m

3. 24.6 m

4. 26.4 m