Answer:
Step-by-step explanation:
28. Area of the circle = π[tex]r^{2}[/tex] where r is the radius of the circle.
Given diameter = 14m, therefore radius = [tex]\frac{14}{2}[/tex] = 7m
Now area of the circle = 49[tex]\pi ^{2}[/tex] or = 49 * 3.14 * 3.14 = 483.12[tex]m^{2}[/tex]
29. Volume of cylinder = π[tex]r^{2}[/tex]h = π*[tex]1.5^{2}[/tex] * 3 = 6.75π cu. feet or 21.195 cu. feet
30. A ball resembles a sphere. Volume of the sphere = [tex]\frac{4}{3} \pi r^{3}[/tex]
Given diameter = 30inches; Therefore, radius = 15 inches
Now, Volume of the ball = [tex]\frac{4}{3} \pi 15^{3}[/tex] = 4500π cu. inches or 14310 cu.inches
