xx, x_{1}x_{1} and x_{2}x_{2} are parallel axes of which XX is the centroidal axis. If moment of inertia of the figure about x_{1}x_{1} axis is 10m^{4}, what is the moment of inertia of the figure about x_{2}x_{2} axis?

Which of the following types of pumps can be used for concreting ? 1. Piston operated. 2. Pneumatically operated. 3. Centrifugal operated, with straight blades. 4. Screw type.