A slab of wood 4m × 4m × 1m specific gravity 0.50 floats in water with 400 Kg mass on it. The volume of the slab submerged, in cubic metres is

A. Frog B. Mould Board C. Land Side D. None of these

A. Depth of bed B. Porosity of the bed C. Density of the particles D. All of the above

A. To carry the seeds and fertiliser in separate compartments B. To open furrows at uniform depth C. To cover the seed and fertiliser D. All of the above

A. Zero B. Positive slip C. Negative slip D. None of these