ML Aggarwal Solutions Class 10 Mathematics Solutions for Mensuration Exercise 17.2 in Chapter 17 - Mensuration

Question 4 Mensuration Exercise 17.2

Curved surface area of a cone is 308 cm2  and its slant height is 14 cm.

Find total surface area of the cone.



The shape of a cone is produced by stacking several triangles and spinning them around an axis. It has a total surface area and a curved surface area because it has a flat base.

Total surface area of the cone = Base area + curved surface area

=π r2+ π rl

= (22/7)×72 +308

= (22/7)×49 +308

= 154+308

= 462

Hence the total surface area of the cone is 462 cm2. M L Aggarwal - Understanding ICSE Mathematics - Class 10 chapter Mensuration Question 4 Solution image

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