If ratio of area of two squares is `1 : 4` then ratio of its circumference

If ratio of the areas of two squares is 1:4, the ratio of their perimeters is

If the ratio of areas of two circles is 4:9, then the ratio of their circumference will be :

Ratio of area of two squares is 1:4. Find ratio of their perimeter.

The ratio of the radii of two wheels is 3:4. The ratio of their circumference is

The ratio of radii of two circles is 3:4. Find the ratio of their circumferences.

If the ratio of areas of two squares is 225 : 256, then the ratio of their perimeter is :

Four identical coins are placed in a square.For each coin,the ratio of area to circumference is the same as the ratio of circumference to area.Find the area of the square that is not covered by the coins