Calculate work done in raising a stone of mass 5kg and specific gravity 3 lying at the bed of a lake through a height of 4 metre.

Calculate work done in raising a stone of mass 5 kg, specific gravity 3, lying at the bed of a lake through a height of 5 metre.

Calculate the work done in raising a stone of mass 5 kg and specific gravity 3, lying at the bed of a lake through a height of 5 m.

Find the work done in lifting a stone of mass 10 kg and specific gravity 3 from the bed of a lake to a height of 6 m in water.

Calculate the work done in raising a stone of mass 6 kg of specific gravity 2 immersed I water from a depth from a depth of 4 m to 1 m below the surface .Take g=10 ms^(-2)