Surface Areas and Volumes

A ................ is a solid or a hollow object that has a circular base and a circular top of the same size

• Cylinder

• Cone

• Sphere

• Hemisphere

In a right circular cone, the cross section made by a plane parallel to the base is a ?

• circle

• frustum of cone

• sphere

• hemisphere

What is the formulae for curved surface area  of the frustum of the cone?

For a cube having each edge 'a' units, lateral surface area is

For a cuboid of length 'l' breadth 'b' and height 'h' lateral surface area is

A solid sphere of radius 'r' is melted and recast into the sphere of a solid cone of height 'r'. The radius of the base of the cone is

• r

• 3r

• 4r

• 2r

Total surface area of a hemisphere of radius 10 cm is. (use π = 3.14)

• 842 sqcm

• 942 sqcm

• 742 sqcm

• 642 sqcm

Formula for calculating total surface area of cuboid is

• 2(l+b) h + lb

• 2(lb + bh + lh)

• 2(lb + lh + lb)

• 2lb + bh + lh

Formula for curved surface area of cylinder

Formula for curved surface area of cone is