Practice Set 9.3

1. Find the surface areas and volumes of spheres of the following radii.
(i) 4 cm (ii) 9 cm (iii) 3.5 cm. (π = 3.14)

Solution (i)

Solution (ii)

Solution(iii)

2. If the radius of a solid hemisphere is 5cm, then find its curved surface area and total surface area. (π = 3.14)

Solution

3. If the surface area of a sphere is 2826cm² then find its volume. (π = 3.14)

Solution

4. Find the surface area of a sphere, if its volume is 38808 cubic cm. (π = 22/7)

Solution

5. Volume of a hemisphere is 18000π cubic cm. Find its diameter.

Solution