### Theory:

In earlier classes, we have learnt how to find the volume of the basic solids such as cube, cuboid, cone, cylinder, sphere and hemisphere.

Let us recall the formulas to find the volume of the solids mentioned above.

 Solid Figure Volume (in cubic units) Formula  description Cube $$a^3$$ $$a$$ - side Cuboid $$l b h$$ $$l$$ - length $$b$$ - breadth $$h$$ - height Cone $$\frac{1}{3} \pi r^2 h$$ $$r$$ - radius $$l$$ - slant height $$l = \sqrt{r^2 + h^2}$$ $$h$$ - height Cylinder $$\pi r^2 h$$ $$r$$ - radius $$h$$ - height Sphere $$\frac{4}{3} \pi r^3$$ $$r$$ - radius Hemisphere $$\frac{2}{3} \pi r^3$$ $$r$$ - radius