ML Aggarwal Solutions Class 10 Mathematics Solutions for Mensuration Exercise 17.3 in Chapter 17 - Mensuration

Question 24 Mensuration Exercise 17.3

Find: The total surface area of a hemisphere of radius 21 cm.



By dividing the sphere into two equal halves, we can produce a hemisphere. The base area of the hemisphere added to its curved surface area gives the hemisphere its total surface area.

Total surface area of the hemisphere = 3π r2

= 3×(22/7)×212

= 3×22×3×21

= 4158 cm2

Hence the total surface area of the hemisphere is 4158 cm2. M L Aggarwal - Understanding ICSE Mathematics - Class 10 chapter Mensuration Question 24 Solution image

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