If the radius of the sphere is doubled then it’s volume is increased by?

Related Mcqs:

1. Surface area of a sphere is 2464 cm2. If its radius is doubled, then the surface area of _________?the new sphere will be

   A. 4920 cm2
   B. 4727 cm2
   C. 9856 cm2
   D. 19712 cm2

2. 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

3. If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in cm²) is________?

   A. 100π
   B. 7π
   C. 60π
   D. 50π

4. How many shots of 1cm radius can be prepared from a sphere of 3cm radius?

   A. 36
   B. 64
   C. 27
   D. 16

5. 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

6. If the volume and surface area of a sphere is numerically the same then it’s radius is_________?

   A. 1 unit
   B. 2 units
   C. 3 units
   D. 4 units

7. If the radius of a circle is increased to 3 times, then how many times will it’s circumference be increased?

   A. 2times
   B. 3times
   C. 1/3 times
   D. 9times

8. The curved surface of a sphere is 64 π cm². Find its radius?

   A. 1 cm
   B. 2 cm
   C. 4 cm
   D. 3 cm

9. The length of the wire of 0.2mm radius that can be drawn after melting a solid copper sphere of diameter 18cm?

   A. 24.3 m
   B. 243 m
   C. 2430 m
   D. 24300 m

10. The radius of a circular cylinder is the same as that of a sphere. Their volumes are equal. The height of the cylinder is________?

    A. 4/3 times its radius
    B. 2/3 times its radius
    C. Equal to it’s radius
    D. Equal to it’s diameter