Q21 What is the volume of the cube?

1. The area of the each face of the cube
   is $$
   64 cm2
   
2. The length of one side of the cube is $8 m$

Q22 How much cardboard will it take to make
an open cubical box with no top?

1. The area of the bottom of the box is $4 m^2$
2. The volume of the box is $$
   8 m3

Q23 What is the total cost of the painting the
inner surface of an open box at the rate
of 50 paise per $$
100cm2

1. The box is made of wood $$
   3 cm thick
2. The external dimensions of the box are $50 cm, 40 cm and 23 cm$

Q24 What is the capacity of cylindrical tank?

1. Radius of the base is half of its height
   which is $$
   28 m
2. Area of the base is $$
   616m2
   and its height is $$
   28 m

Q25 What is the volume of the cylinder?

1. Height is equal to the diameter.
2. Perimeter of the base is $$
   352 cm

Q26 Is a rectangular block, a cube?

1. At least 2 faces of the rectangular block
   are squares
2. The volume of the block is 64

Q27 Directions(questions 47 to 50): Each of the
questions given below consists
of a question followed by three statements
You have to study the question and the
statements and decide which of the
statement(s) is/are neccesary to
answer the question:

What is the capacity of cylindrical
tank?
1.The area of the base is $$
61,600 cm2
2. The height of the tank is 1.5 times the radius
3. The circumference of base is $$
880 cm

Q28 What is the capacity of cylindrical tank?

1. Radius of the base is half of its height
2. Area of the base is $$
   616m2
3. Height of the cylinder is $$
   28 m

Q29 A solid metallic cone is melted and recast
into a sphere. What is the radius of the
sphere?

1. The radius of the base of the cone is$2.1 cm$
2. The hieght of the cone is four times the radius
   of its base
3. The hieght of the cone is $$
   8.4 cm

Q30 What is the total surface area of the cone?

1. Area of the base of the cone is $154 c{m}^2$
2. The curved surface area of the cone is $550 c{m}^2$
3. The volume of the cone is $1232 c{m}^3$