Find the total surface area of a hemisphere of radius 10 cm. (Use π = 3.14)

Solution:

A hemisphere is exactly half of a sphere having one circular surface at the top.

The total surface area of a hemisphere is half of the surface area of a sphere along with the top circular area added to it.

TSA of hemisphere = (4πr²)/2 + πr² = 3πr²

The radius of the hemisphere, r = 10cm

Total Surface area = 3πr²

= 3 × 3.14 × 10cm × 10cm

= 942 cm²

The total surface area of the hemisphere is 942 cm²..

☛ Check: Class 9 Maths NCERT Solutions Chapter 13

Video Solution:

Find the total surface area of a hemisphere of radius 10 cm. (Use π = 3.14)

Class 9 Maths NCERT Solutions Chapter 13 Exercise 13.4 Question 3

Summary:

It is given that there is a hemisphere of radius 10 cm. We have found that the total surface area of the hemisphere is 942 cm².

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