Question

A science museum has a spherical model of the earth with a diameter of 6.5 m. What is the volume of the model? Use 3.14 for and round your answer to the nearest whole number. Show your work.

Answer 1

radius = diameter/2

radius = 6.5/2  =   $\frac{13}{4}$m

volume  $= \frac{4}{3}$ x $\pi$ x (radius)³

              $= \frac{4}{3}$ x $\pi$ x $( \frac{13}{4})^3$

              $= \frac{4}{3}$ x $\pi$ x $\frac{2197}{64}$

              $= \frac{2197}{64}$

              = 144 cubic meters