The ratio of the radius of two circles is 1: 3, and then the ratio of their areas is_________?

Related Mcqs:

1. The circumferences of two circles are 264 meters and 352 meters. Find the difference between the areas of the larger and the smaller circles.

   A. 4192 sq m
   B. 4304 sq m
   C. 4312 sq m
   D. 4360 sq m

2. There are two circles of different radii. The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. The radius of the smaller circle is three-seventh that of the larger circle. What is the circumference of the smaller circle ?

   A. 12 π cm
   B. 16 π cm
   C. 24 π cm
   D. 32 π cm

3. A paper is in a square form whose one side is 20 cm. Two semi circles are drawn on its opposites as diameters. If these semi circles are cut down what is the area of the remaining paper?

   A. (400 – 100π) cm^2</sup
   B. (400 – 2π) cm^{2</sup
   C. (400 – 200π) cm2</sup
   D. 200π cm2</sup}

4. The difference between the radi of the smaller circle and the bigger circle is 7cm and the difference between the area of two circles is 1078Sq.cm Radius of the smaller circle is_________?

   A. 17.5cm
   B. 21cm
   C. 28cm
   D. None of these

5. The area of a circle is increased by 22Sq.cm when it’s radius is increased by 1cm. The original radius of the circle is_________?

   A. 6cm
   B. 3.2 cm
   C. 3 cm
   D. 3.5 cm

6. If the ratio of the areas of two squares is 9:1 ratio of their perimeters is_________?

   A. 9:1
   B. 3:1
   C. 3:4
   D. 1:3

7. An order was placed for the supply of a carper whose length and breadth were in the ratio of 3 : 2. Subsequently, the dimensions of the carpet were altered such that its length and breadth were in the ratio 7 : 3 but were was no change in its parameter. Find the ratio of the areas of the carpets in both the cases.

   A. 4 : 3
   B. 8 : 7
   C. 4 : 1
   D. 6 : 5

8. The height of two right circular cones are in the ratio 1:2 and their perimeters of their bases are in the ratio 3:4, the ratio of their volume is_________?

   A. 3:8
   B. 9:16
   C. 9:32
   D. 9:64

9. A right cylinder and a right circular cone have the same radius and the same volume. The ratio of the height of the cylinder to that of the cone is_________?

   A. 3: 5
   B. 2: 5
   C. 3: 1
   D. 1: 3

10. A metallic sphere of radius 12 cm is melted and drawn into a wire, whose radius of cross section is 16 cm. What is the length of the wire?

    A. 45 cm
    B. 18 cm
    C. 90 cm
    D. None of these