A solid metal sphere is cut through its centre into 2 equal parts. If the diameter of the sphere is , find the total surface area of each part correct to two decimal places.
20.88 cm2
25.89 cm2
28.86 cm2
28.88cm2
The diameter of the base of a right circular cylinder is 28 cm and its height is 21 cm. Find its curved surface area.
1488 cm2
1248 cm2
3080 cm2
1848 cm2
A sphere of radius 8cm is melted and recast into a right circular cone of height 32 cm. Find the radius of the base of the cone.
6 cm
8 cm
7 cm
9 cm
Determine the ratio of the volume of a cube to that of a sphere which will exactly fit inside the cube.
11 : 21
1 : 2
21 : 11
10 : 16
The circumference of a circular field is 440m. Find its radius.
60m
76m
75m
70m
Find the circumference of the circle whose area is 16 times the area of the circle with diameter 1.4m.
16.7 m
17.6 m
17.7m
17 m
The ratio between the circumference of two circles is 4 : 9, find the ratio between their areas.
15 : 80
16 : 71
16 : 81
15 : 81
The square areas of two spheres are in the radius of 9 : 25. Then their volumes are in the ratio
81 : 625
729 : 15625
27 : 75
27 : 125
The surface area of a sphere is 2464 cm2 , find its volume.
11489.76 cm3
11498.67cm3
11894.67 cm3
11490.86 cm3
A solid cone of height 8cm and base radius 6 cm is melted and recast into identical cones, each of height 2cm and diameter 1 cm. Find the number of cones formed.
506
576
657
675
