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# 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 = (4πr^{2})/2 + πr^{2} = 3πr^{2}

The radius of the hemisphere, r = 10cm

Total Surface area = 3πr^{2}

= 3 × 3.14 × 10cm × 10cm

= 942 cm^{2}

The total surface area of the hemisphere is 942 cm^{2}..

**☛ 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 cm^{2}.

**☛ Related Questions:**

- The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.
- A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of ₹16 per 100 cm².
- Find the radius of a sphere whose surface area is 154 cm².
- The diameter of the moon is approximately one fourth of the diameter of the earth. Find the ratio of their surface areas.

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