## Aptitude Volume and Surface Area Test Paper 311) If the curved surface area of a sphere is same as the curved surface area of a hemisphere, find the radius of the hemisphere. - Same as that of the sphere.
- times that of the sphere.
- times that of the sphere.
- 2 times that of the sphere.
Curved surface area of a sphere = Curved surface area of a hemisphere 12) The radii of two cylinders are in the ratio of 2: 3 and their heights are in the ratio of 5: 3. The ratio of their volume is - 4: 9
- 9: 4
- 20: 27
- 20: 25
Let the radius of both cylinders be 2x and 3x. 13) The radius of road roller is 1 meter and length 7/22 meter. When it is rolled on a ground then it rolls 500 times to level the ground. But it was found that on 5% part of the ground, roller rolled twice. What is the total area of the ground? - 1000/Π
^{2}m^{2} - 975 m
^{2} - 975 m
^{2} - 950 m
^{2}
Let the area of the ground = x meter 14) A copper sphere of radius 3 cm is beaten and drawn into a wire of diameter 0.2 cm. The length of the wire is - 9 m
- 12 m
- 18 m
- 36 m
Radius of wire = = 0.1 Volume of sphere = Volume of cylinder 15) A hollow sphere of internal and external diameters 4 cm and 8 cm respectively is melted to form a solid cylinder of base diameter 8 cm. What is the height of the cylinder? - 4.5 cm
- 4.57 cm
- 4.67 cm
- 4.7 cm
Let the height of the cylinder be h. Aptitude Volume and Surface Area Test Paper 1 Aptitude Volume and Surface Area Test Paper 2 Aptitude Volume and Surface Area Test Paper 4 Aptitude Volume and Surface Area Test Paper 5 |