Chapter Exam

Chapter 11 MATHS : Surface Areas and Volumes — Online MCQ Test

Q: What is the formula for the curved surface area of a right circular cone with radius 'r' and slant height 'l'?

Answer: B. πrl — The curved surface area of a cone is given by the product of π, radius, and slant height.

Q: The surface area of a sphere with radius 'r' is given by:

Answer: D. 4πr² — The surface area of a sphere is defined as 4 times π times the square of the radius.

Q: If the radius of a sphere is 7 cm, what is its surface area? (Take π = 22/7)

Answer: C. 616 cm² — Using 4πr², we get 4 * (22/7) * 7 * 7 = 616 cm².

Q: Two spheres have radii in the ratio 1:2. The ratio of their surface areas is:

Answer: B. 1:4 — Ratio of surface areas = (r1/r2)² = (1/2)² = 1/4.

Q: A right circular cone is cut by a plane parallel to the base. What is the shape of the cross-section?

Answer: C. Circle — A horizontal slice parallel to the circular base of a cone always results in a smaller circle.

MATHS · CLASS 9th · Andhra State Board

Practice Chapter 11 MATHS : Surface Areas and Volumes with a free chapter-wise online MCQ test for Andhra State Board CLASS 9th MATHS. This chapter covers: This chapter covers surface area and volume calculations for 3D geometric shapes including right circular cones and spheres.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11 MATHS : Surface Areas and Volumes — Important Questions & Answers (FAQ)

Frequently asked questions from Andhra State Board CLASS 9th MATHS — Chapter 11 MATHS : Surface Areas and Volumes, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the formula for the curved surface area of a right circular cone with radius 'r' and slant height 'l'?