Home > Class 9 Math > Quizzes > Class 9 Maths Practice Test: Surface Areas and Volumes - Surface Area of a Right Circular Cone
Class 9 Maths Practice Test: Surface Areas and Volumes - Surface Area of a Right Circular Cone
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Total surface area of a right circular cone = π(r + l) r.

Volume of a right circular cone = 1/3π r2 h.

Class 9 Maths Practice Test: Surface Areas and Volumes - Surface Area of a Right Circular Cone
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6 Questions

1. The curved surface area of a cone is 1980 cm2 and its radius is 21cm, what is the slanted height of a cone? (Take π = \(\frac{22}{7}\))
2. The total surface area of a cone of base radius “r” and slanted height “l” is equal to __________
3. A tent of conical shape of base radius 28m and slanted height 20m is to be made from a certain material. What is the total cost of clothing material if the rate of material is ₹80/m2? (Take π = \(\frac{22}{7}\))
4. A vessel of conical shape of radius 14cm and slanted height 20cm is to be coloured. What is the cost of painting at a rate of ₹2/cm2? (Take π = \(\frac{22}{7}\))
5. What is the total surface area of a cone of radius 7cm and height 24cm? (Take π = \(\frac{22}{7}\))
6. In the figure given below, the cone is right circular cone.
maths-questions-answers-surface-area-right-circular-cone-q1

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