Question

Pls help I don’t get any of them

Answer 1

Answer:

Step-by-step explanation:

28.   Area of the circle = π$r^{2}$ where r is the radius of the circle.

       Given diameter = 14m, therefore radius = $\frac{14}{2}$ = 7m

       Now area of the circle = 49$\pi ^{2}$ or = 49 * 3.14 * 3.14 = 483.12$m^{2}$

29. Volume of cylinder = π$r^{2}$h = π*$1.5^{2}$ * 3 = 6.75π cu. feet or 21.195 cu. feet

30. A ball resembles a sphere. Volume of the sphere = $\frac{4}{3} \pi r^{3}$

      Given diameter = 30inches; Therefore, radius = 15 inches

 Now, Volume of the ball = $\frac{4}{3} \pi 15^{3}$ = 4500π cu. inches or 14310 cu.inches