CBSE Class 9 Maths Surface Areas and Volumes MCQs Set A with answers available in Pdf for free download. The MCQ Questions for Class 9 Mathematics with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 9 by CBSE, NCERT and KVS. Multiple Choice Questions are an important part of Term 1 and Term 2 exams for Grade 9 Mathematics and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for NCERT Class 9 Mathematics and also download more latest study material for all subjects

## Surface Areas and Volumes Class 9 MCQ

Class 9 Mathematics students should refer to the following multiple-choice questions with answers for Surface Areas and Volumes in standard 9. These MCQ questions with answers for Grade 9 Mathematics will come in exams and help you to score good marks

### Class 9 Surface Areas and Volumes MCQ Questions with Answers

**1. The surface area of a cuboid is**

(a) 2(lb + bh + lh) (b) 3(lb + bh + lh) (c) 2(lb – bh – lh) (d) 3(lb – bh – lh)

**2. The surface area of a cube if edge ‘a’ is**

(a) 7a^{2} (b) 6a^{2} (c) 5a^{3} (d) 5a^{2}

**3. The length, breadth and height of a room is 5m, 4m and 3m. The cost of white washing its four walls at the rate of Rs. 7.50 per m ^{2} is**

(a) Rs. 110 (b) Rs. 109 (c) Rs. 220 (d) Rs. 105

**4. The perimeter of floor of rectangular hall is 250m. The cost of the white washing its four walls is Rs. 15000. The height of the room is**

(a) 5m (b) 4m (c) 6m (d) 8m

**5. The breadth of a room is twice its height and is half of its length. The volume of room is 512dm ^{3}. Its dimensions are**

(a) 16 dm, 8 dm, 4 dm (b) 12 dm, 8 dm, 2 dm

(c) 8 dm, 4 dm, 2 dm (d) 10 dm, 15 dm, 20 dm

**6. The area of three adjacent faces of a cube is x, y and z. Its volume V is **

(a) V = xyz (b) V^{3} = xyz (c) V^{2} = xyz (d) none of these

**7. Two cubes each of edge 12 cm are joined. The surface area of new cuboid is**

(a) 140 cm^{2} (b) 1440 cm^{2} (c) 144 cm^{2} (d) 72 cm^{2}

**8. The curved surface area of cylinder of height ‘h’ and base radius ‘r’ is**

(a) 2∏rh (b) ∏rh (c) 1/2∏rh (d) none of these

**9. The total surface area of cylinder of base radius ‘r’ and height ‘h’ is**

(a) 2π(r + h) (b) 2πr(r + h) (c) 3πr(r + h) (d) 4πr(r + h)

**10. The curved surface area of a cylinder of height 14 cm is 88 cm2. The diameter of its circular basei**s

(a) 5cm (b) 4cm (c) 3cm (d) 2cm

**11. It is required to make a closed cylindrical tank of height 1 m and base diameter 140cm from a metal sheet. How many square meters a sheet are required for the same?**

(a) 6.45m^{2} (b) 6.48m^{2} (c) 7.48m^{2} (d) 5.48m^{2}.

**12. A metal pipe is 77 cm long. Inner diameter of cross section is 4 cm and outer diameter is 4.4 cm. Its inner curved surface area is:**

(a) 864 cm^{2} (b) 968 cm^{2} (c) 768 cm^{2} (d) none of these

More Questions......................

#### Question: Each side of a cube is increased by 50%. Then the surface area of the cube increases by

- a) 50%
- b) 100%
- c) 150%
- d) 125%

**Answer: 50%**

#### Question: Instead of walking along two adjacent sides of a rectangular field, a boy took a short cut along the diagonal and saved a distance equal to half the longer side. Then the ratio of the shorter side to the longer side is

- a) 3/4
- b) 2/3
- c) 1/2
- d) 1/4

**Answer: 3/4**

#### Question: The number of surfaces in right circular cylinder is

- a) 4
- b) 2
- c) 1
- d) 3

**Answer: 4**

#### Question: A covered wooden box has the inner measures as 115 cm, 75 cm and 35 cm. Find the volume of the wood.

- a) 82,125 cu cm
- b) 85,000 cu cm
- c) 84,000 cu cm
- d) 80,000 cu cm

**Answer: 82,125 cu cm**

#### Question: The edge of a cube is 20 cm. How many small cubes of 5 cm edge can be formed from this cube?

- a) 64
- b) 4
- c) 32
- d) 100

**Answer: 64**

#### Question: A metallic right circular cone of height 9 cm and base radius 7 cm is melted into a cuboid whose two sides are 11 cm and 6 cm. What is the third side of the cuboid?

- a) 7 cm
- b) 5 cm
- c) 6 cm
- d) 10 cm

**Answer: 7 cm**

#### Question: The slant height of a cone is increased by P%. If radius remains same, the curved surface area is increased by

- a) P%
- b) 2P%
- c) P
^{2}% - d) None of these

**Answer: P%**

#### Question: The dimensions of a hall are 40 m, 25 m and 20 m. if each person requires 200 cubic metre, then the number of persons who can be accommodated in the hall are

- a) 100
- b) 150
- c) 120
- d) 140

**Answer: 100**

#### Question: A hollow spherical ball whose inner radius is 4 cm is full of water. Half of the water is transferred to a conical cup and it completely filled the cup. If the height of the cup is 2 cm, then the radius of the base of cone, in cm is

- a) 8
- b) 4
- c) 16
- d) 12

**Answer: 8**

#### Question: The radius of the cylinder whose lateral surface area is 704 cm^{2} and height 8 cm is

- a) 14 cm
- b) 4 cm
- c) 6 cm
- d) 8 cm

**Answer: 14 cm**

#### Question: The radius of cylinder is doubled but its lateral surface area is unchanged. Then its height must be

- a) halved
- b) constant
- c) doubled
- d) tribled

**Answer: halved**

#### Question: The ratio of the volume and surface area of a sphere of unit radius

- a) 1 : 3
- b) 4 : 3
- c) 3 : 4
- d) 3 : 1

**Answer: 1 : 3**

#### Question: A cylindrical rod whose height is 8 times of its radius is melted and recast into spherical balls of same radius. The number of balls will be

- a) 6
- b) 4
- c) 3
- d) 8

**Answer: 6**

#### Question: A sphere and a cube are of the same height. The ratio of their volume is

- a) 11 : 21
- b) 21 : 11
- c) 3 : 4
- d) 4 : 3

**Answer: 11 : 21**

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