Question

The volume of a spherical shell whose external and internal diameters are 14 cm and 10 cm respectively:

• A. $42\pi c{m}^3$
  
• B. $\frac{872}{3}\pi c{m}^3$
  
  
• C. $118\pi c{m}^3$
  
• D. $86\pi c{m}^3$
  

Answer 1

The correct option is B $\frac{872}{3}\pi c{m}^3$



Volume of the spherical shell $=\frac{4}{3}\pi (R^3-r^3)$
$=\frac{4}{3}\pi (7^3-5^3)=\frac{872}{3}\pi$