Use π = 3.1 and give answers to 3 significant figures.

1. Find the volume and surface area of the following sphere, if r = 8 mm.

2. A sphere has a diameter 24.2 cm . What is its volume and surface area?


For the following solid sphere, find:

a. The volume. Give the answers in mm3

b. The surface area. Give the answers in m2


4. Assuming the Earth is a sphere, with a diameter of 12,700 kilometres, find its approximate surface area.