In a hot water heating system,there is a cylindrical pipe of length 28m and diameter 5m. Find the total radiating surface in the system.
14,000cm2
30,000cm2
44,000cm2
50,000cm2
The total surface area of a hemisphere of radius 10cm is
512cm2
564cm2
628cm2
630cm2
The radii of two cylinders are in the ratio 2:3 and their height are in the ratio 5:3 .Calculate the ratio of their volumes
10 / 9
32 / 15
27 / 20
20 / 27
The lateral surface area of a cube of edge 10 cm.
400sq.cm
450sq.cm
200sq.cm
100sq.cm
A hemisphere of lead of radius 7cm is cast into a right circular cone of height 49cm.Then the radius of the base is .
1.24 cm
2.53 cm
3.6 cm
3.74 cm
A cone and a hemisphere have equal bases and equal volumes.Find the ratio of their heights.
3:2
2:1
2:3
1:4
Find the ratio between the total surface area of a cylinder to its curved surface area,given that its height and radius are 7.5cm and 3.5cm
21:15
22:15
20:22
7.5:3.5
Two circular cylinders of equal volumes have their heights in the ratio 1:2.Find the ratio of their radii.
1:2
√2:1
8:1
The ratio of the total surface area and lateral surface area of a cube is
1:3
The volume of a sphere of radius 7cm is
1632 cm3
1556.43 cm3
1518.23 cm3
1437.33 cm3
