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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics
Curved Surface Area of Cone



Curved Surface Area S = pi * r * l
where l is the slant height
= 1/2 (Circumference of base) * slant height
= (1/2) C * l
Curved Surface Area = = (1/2) C * l

Example:
The slant height of a cone is 10cm. the diameter of the base if 15cm. Find the curved surface area of cone.
Solution:
Given that,
Slant height = 10cm.
Diameter = 15cm.
radius = d/2 = 15/2 = 7.5cm.
Curved surface area = pi * r * l
= 22/7 * 7.5 * 10
= 235.7142 Sq. cm.
= 235.41 Sq. cm. (Converted into two decimal places)

Directions: Solve the following problems. Also write at least 5 examples of your own.
Q 1: The slant height of a cone is 13cm. the radius of the base is 14cm. Find the curved surface area.
574 Sq. cm.
572 Sq. cm.
578 Sq. cm.
576 Sq. cm.

 Q 2: The slant height of a cone is 16cm. the radius of the base is 35cm. Find the curved surface area.
1760 Sq. cm.
1764 Sq. cm.
1758 Sq. cm.
1762 Sq. cm.

Q 3: The slant height of a cone is 7cm. the radius of the base is 20cm. Find the curved surface area.
440 Sq. cm.
438 Sq. cm.
436 Sq. cm.
442 Sq. cm.

 Q 4: The slant height of a cone is 15cm. the radius of the base is 24.5cm. Find the curved surface area.
1157 Sq. cm.
1159 Sq. cm.
1153 Sq. cm.
1155 Sq. cm.

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 Question 6: This question is available to subscribers only!

Question 7: This question is available to subscribers only!

 Question 8: This question is available to subscribers only!


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