A. 1 cm
B. 2 cm
C. 4 cm
D. 3 cm
Related Mcqs:
- 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 - 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 - The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height.
A. 3 : 7
B. 7 : 3
C. 6 : 7
D. 7 : 6 - The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?
A. 18 πr2 sq units
B. 3 πr2 sq units
C. 12 πr2 sq units
D. 6 πr2 sq units - The slant height of a cone is 12 cm and radius of the base is 4cm, find the curved surface of the cone.
A. 74 π cm2
B. 36 π cm2
C. 48 π cm2
D. 24 π cm2 - How many shots of 1cm radius can be prepared from a sphere of 3cm radius?
A. 36
B. 64
C. 27
D. 16 - 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 - 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 - If the radius of the sphere is doubled then it’s volume is increased by?
A. 100 %
B. 200 %
C. 700 %
D. 800 % - 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
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