The volume of a right circular cylinder if,the radius (r) of its base and height(h)are 7cm and 15cm respectively is
2310cm3
3465cm3
5720cm3
2125cm3
The volume of a sphere of radius 7cm is
1632 cm3
1556.43 cm3
1518.23 cm3
1437.33 cm3
.A shopkeeper has one ladoo of radius 5 cm with same material,how many ladoos of radius 2.5cm can be made.
2
4
6
8
The diameter of the moon is approximately one fourth of the diameter of the earth .Find the ratio of their surface
areas.
1:16
2:13
2:15
1:15
The surface area of a sphere is 5544 sq.cm,then its diameter is
21cm
42cm
25cm
50cm
The curved surface area of a cone is 4070cm2 and its diametre is 70cm,then its slant height is
20cm
28cm
37cm
45cm
The diameter of a right circular cone is 8cm and its volume is 48π cu.cm.What is it's height?
2 cm
4 cm
5 cm
9 cm
The area of the curved surface of a cone is 60π cm2.If the slant height of the cone be 8cm, then the radius of the base is
7.5cm
8cm
9cm
9.5cm
There are two cones.Thecurved surface area of one is twice that of the other.The slant height of the later is twice that of the former.Find the ratio of their radii.
2:3
4:3
4:1
4:5
If the radius of a sphere is doubled,what is the ratio of the volume of the first sphere to that
of the second sphere.
1:4
1:5
1:8
2:7
