A Solid iron rod has a cylindrical shape. Its height is 11cm and base diameter is 7cm. Then the total volume of 50 rods is

The shape of solid iron rod is cylinder,         

Height of iron rod (h) = 11 cm

Diameter of iron rod (d) = 7 cm

Radius of iron rod(r) $=\frac{7}{2}cm$

Volume of iron rod $=\pi r^{2}h=\frac{22}{7}\times \frac{7}{2}\times \frac{7}{2}\times 11c{m}^2=\frac{847}{2}c{m}^2$

$\therefore$ Volume of 50 iron rods $=\frac{847}{2}\times 50c{m}^3=21175c{m}^3$