If the radii of circles A and B are in the ratio 1.5: 1, then the areas of the circles A and B will be in the ratio

If the radius of the circle is increased by 100%, then the area is increased by

The ratio of the angles ∠A and ∠B of a non-square rhombus ABCD is 4 : 5, the value of ∠C will be

If the difference between the circumference and radius of a circle is 37 cm, then the area of the circle is

If the perimeter and the area of a circle are numerically equal, then the radius of the circle is

The surface area of a sphere is 616 sq. cm, then what will be its radius?