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Test: Surface Area of a Cone - Class 9 MCQ


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10 Questions MCQ Test Mathematics (Maths) Class 9 - Test: Surface Area of a Cone

Test: Surface Area of a Cone for Class 9 2024 is part of Mathematics (Maths) Class 9 preparation. The Test: Surface Area of a Cone questions and answers have been prepared according to the Class 9 exam syllabus.The Test: Surface Area of a Cone MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Surface Area of a Cone below.
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Test: Surface Area of a Cone - Question 1

The area surrounded by a conical tent is 4526 m2. If the cost of canvas is Rs. 17 per square meter, then find the total cost of canvas.​

Detailed Solution for Test: Surface Area of a Cone - Question 1

total cost = area of canvas used x cost of per meter square canvas

= 4526 x 17 

= Rs. 76942

Test: Surface Area of a Cone - Question 2

The height of a right circular cone is 3 cm and its base radius is 4 cm. Find the curved surface area of the cone

Detailed Solution for Test: Surface Area of a Cone - Question 2

The curved surface area (CSA) of a cone is given by:

CSA = πrl

Where:

  • r = base radius of the cone
  • l = slant height of the cone

The slant height l can be calculated using

 

Calculating CSA

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Test: Surface Area of a Cone - Question 3

A conical tomb of base diameter 24m and height 16 m. What is the curved surface area?

Detailed Solution for Test: Surface Area of a Cone - Question 3


Test: Surface Area of a Cone - Question 4

The curved surface area of a right circular cone whose slant height is 14 cm and base radius is 21 cm is​

Detailed Solution for Test: Surface Area of a Cone - Question 4

L = 14 cm
R = 21 cm
C S A of Cone = πRL
22/7 * 21 * 14 cm
22 * 21 * 2 cm
462 * 2 cm
924 cm2

Test: Surface Area of a Cone - Question 5

A conical tent is 15 m high and the radius of its base is 20 m. The cost of the canvas required to make the tent at the rate of Rs 7 per m2 is​

Test: Surface Area of a Cone - Question 6

The solid generated by the rotation of a right triangle about one of its sides containing the right angle is called a ………

Detailed Solution for Test: Surface Area of a Cone - Question 6
When the triangle is rotated about its side it becomes the height of the cone and the other side containing the right angle becomes the radius..
Test: Surface Area of a Cone - Question 7

The total surface area of a cone of slant height 9 cm and radius 5 cm is​

Test: Surface Area of a Cone - Question 8

A right circular cone has an altitude of 40 cm and a diameter of 60 cm. The slant height of the cone is

Detailed Solution for Test: Surface Area of a Cone - Question 8

d=60
so r=30
l=√r2+h2
l= √302+402
l=50

Test: Surface Area of a Cone - Question 9

An ice cream cone has base radius 6 cm and altitude 8 cm. The total surface area of 21 such cones is​

Test: Surface Area of a Cone - Question 10

The curved area of a cone is 242 cm2 and its radius and slant height are in the ratio 7:11. Calculate the radius of the cone.​

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