The volume of a sphere is 88/21 ( 14 )3 cm 3. The curved surface of this sphere is
2424 cm2
2446 cm2
2464 cm2
2484 cm2
The ratio of total surface area to lateral surface area of a cylinder whose radius is 80 cm and height is 20 cm is
2 : 1
3 : 1
4 : 1
5 : 1
A hemisphere of lead of radius 7 cm. is cast into a right circular cone of height 49 cm. Then the radius of base is
3.74 cm
4 cm
4.50 cm
5 cm
A cylindrical tower is 5 m in diameter and 14 m high. The cost of white washing its curved surface at 50 paisa per m2 is
Rs. 90
Rs.97
Rs.100
Rs.110
The curved surface of a sphere is 1386 cm2. Its volume is
2772 cm3
4158 cm3
4851 cm3
5544 cm3
The height of a cone is 16 cm. and the diameter of its base is 24 cm. Then the volume of the cone is
2413.71 cu.cm
2400 cu.cm
2450 cu.cm
2500 cu.cm
A vessel is in the form of an inverted cone. Its height is 11 cm and the radius of its top which is open is 2 . 5 cm. It is filled with water up to the rim. When lead shots, each of which is a sphere of radius 0.25 cm are dropped in to the vessel, 2/5 of the water flows out. Find the number of lead shots dropped in to the vessel
450
400
500
440
A toy is in the form of a cone mounted on a hemisphere with the same radius. The diameter of the base of the conical portion is 12 cm and its height is 8 cm. Then the surface area of the toy is _______.
414 cm2
414.48 cm2
415 cm2
415.48 cm2
If the radii of two spheres are in ratio 1: 2. then ratio of their surface areas will be
1 : 2
1 : 4
1 : 8
1 : 16
The surface area of a sphere whose radius is 2.1 metres.
55m2
58m2
55.44 m2
56 m2
