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CBSE Class 9 Mensuration: Perimeter and Area — practice questions — page 4

Explore 103 free Mensuration: Perimeter and Area questions in CBSE Class 9 Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Mensuration: Perimeter and Area questions and exercises with answers

Showing questions 91–103 of 103.

The r in the hemisphere formulas is the radius of the:Read the answer and worked solution →The study of surface areas is extended here to spheres and:Read the answer and worked solution →Quick picks on surface areasRead the answer and worked solution →Match each solid to its surface formulaRead the answer and worked solution →Prism or pyramidRead the answer and worked solution →Part of a cone or a sphereRead the answer and worked solution →Find a cone's curved surfaceRead the answer and worked solution →Fill the gaps on surface areasRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Match each circular 3D solid with its curved surface area (CSA) formula:Read the answer and worked solution →Match each circular solid with its volume formula:Read the answer and worked solution →Match each hemisphere surface area component (radius r):Read the answer and worked solution →Match Heron's formula components for triangle area:Read the answer and worked solution →

Worked practice questions

The r in the hemisphere formulas is the radius of the:

  1. Base cone
  2. Parent sphere
  3. Flat cut only
  4. Curved edge
Show answer and solution

Correct answer: B. Parent sphere

1. A hemisphere comes from cutting a sphere. 2. Its radius is inherited from that sphere. 3. So r is the radius of the sphere of which it is a part. _Source: syllabus Mathematics, Chapter 13, Surface Areas and Volumes._

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The study of surface areas is extended here to spheres and:

  1. Cubes
  2. Prisms
  3. Discs
  4. Cones
Show answer and solution

Correct answer: D. Cones

1. Cuboids, cubes and cylinders were covered before. 2. Two further solids are taken up. 3. They are cones and spheres. _Source: syllabus Mathematics, Chapter 13, Surface Areas and Volumes._

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Quick picks on surface areas

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Questions
  1. Question
    A cuboid's surface has how many rectangles:
    Choices
    1. Six
    2. Four
    3. Eight
    Correct choice
    Six
  2. Question
    Stacked circles make a right circular:
    Choices
    1. Cone
    2. Cylinder
    3. Sphere
    Correct choice
    Cylinder
  3. Question
    The sloping edge of a cone is its:
    Choices
    1. Height
    2. Radius
    3. Slant height
    Correct choice
    Slant height
  4. Question
    Half a sphere is a:
    Choices
    1. Hemisphere
    2. Frustum
    3. Cone
    Correct choice
    Hemisphere
  5. Question
    Total surface of a hemisphere is pi r squared times:
    Choices
    1. Two
    2. Three
    3. Four
    Correct choice
    Three
Instructions
Tap the correct answer before the round moves on.
_Source: syllabus Mathematics, Chapter 13, Surface Areas and Volumes._

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