Worksheet on Surface Area of Hemisphere for Class 1

Practice Questions on Surface Area of Hemisphere

1. The curved surface area of a hemisphere is 50π cm². What is the radius of the hemisphere?

a) 4 cm
b) 5 cm
c) 10 cm
d) 20 cm

Answer: b) 5 cm

2. How is the surface area of a hemisphere related to the surface area of a sphere?

a) It is half the surface area of a sphere
b) It is the same as the surface area of a sphere
c) It is double the surface area of a sphere
d) It is unrelated to the surface area of a sphere

Answer: a) It is half the surface area of a sphere.

3. What is the total surface area of a hemisphere with a diameter of 10 cm?

a) 20π cm²
b) 25π cm²
c) 15π cm²
d) 75π cm²

Answer: 75π cm²

4. The radius of a hemisphere is 10 cm. What is the curved surface area of the hemisphere?

a) 100π cm²
b) 200π cm²
c) 20π cm²
d) 40π cm²

Answer: b) 200π cm²

5. The radius of a hemisphere is 8 cm. What is the total surface area of the hemisphere?

a) 120π cm²
b) 125π cm²
c) 116π cm²
d) 192π cm²

Answer: d) 192π cm²

6. What is the formula for finding the total surface area of a hollow hemisphere?

a) 4πr²
b) 2π (r₂² + r₁²) + π (r₂² - r₁²)
c) 2πr (r + h)
d) 3πr²

Answer: b) 2π (_r2² + r₁²) + π (r₂² - r₁²)

7. A hollow hemisphere with an inner radius of 4 cm and an outer radius of 8 cm. What is the total surface area of a hollow hemisphere?

a) 224π cm²
b) 200π cm²
c) 208π cm²
d) 220π cm²

Answer: c) 208π cm²

8. A hollow hemisphere has an inner radius of 2 units and an outer radius of 4 units. What is its total surface area?

a) 40π units²
b) 52π units²
c) 56π units²
d) 32π units²

Answer: b) 52π units²

9. What is the total surface area of a hollow hemisphere with an outer radius of 15 cm and an inner radius of 5 cm?

a) 200π cm²
b) 300π cm²
c) 700π cm²
d) 900π cm²

Answer: c) 700π cm²

10. What is the Total surface area of a hemisphere with a radius of 10 cm?

a) 400π cm²
b) 200π cm²
c) 300π cm²
d) 500π cm²

Answer: c) 300π cm²