Mensuration Tes...

The diameter of the base of a right circular cylinder is $$21\mathrm { cm }$$ and its height is $$10\ \mathrm { cm }$$ . What is the area of the curved surface? 

The diameter of a cylinder is $$28$$cm and its height is $$20$$cm find the curved surface area.

The diameter of a cylinder is $$28$$cm and its height is $$20$$cm find the total surface area.

The area of trapezium $$ABCD$$ is 

The area of given trapezium is 

Volume of a rectangular box (cuboid) with length $$=2ab,$$ breadth $$=3ac$$ and height $$=2ac$$ is 

Find the total surface area of the cuboids of length, breadth and height 

Mark the correct alternative of the following.
The number of surfaces of a hollow cylindrical object is?

Mark the correct alternative of the following.
A cylinder with radius $$r$$ and height $$h$$ is closed on the top and bottom. Which of the following expressions represents the total surface area of this cylinder?

A right circular cylindrical tunnel of diameter $$2$$m and length $$40$$m is to be constructed from a sheet of iron. The area of the iron sheet required in $$m^2$$, is?