A farmer was having a field in the form of a parallelogram PQRS. She took any point A on RS and joined it to points P and Q.In how many parts the field is divided ? What are the shapes of these parts ? The farmer wants to sow wheat and pulses in equal portions of the field separately. How should she do it ?

Show that if at some part of a field the lines of force have the form of arcs of concentric circles whose centres are at point O (Fig.), the field intensity at each point in this part of the field should be inversely proportional to the distance from the point to O.

Sanya has a piece of land which is in the shape of a rhombus (See Fig. ). She wants her four children to work on the land and produce different crops to suffice the needs of their family. She divided the land in four parts by joining its opposite comers. If the perimeter of the land is 400 m and one of the diagonals is 160 m, how much area each child will get to work on.

Sanya has a piece of land which is in the shape of a rhombus (See Fig. ). She wants her one daughter and one son to work on the land and produce different crops to suffice the needs of their family. She divided the land in two parts by joining its opposite comers. If the perimeter of the land is 400 m and one of the diagonals is 160 m, how much area each of them will get to work on.

Two point charges q and-q are placed at a distance 2a part. Calculate the electric field at a point P situated at a distance r along the axial line of an electric dipole. What is the electric field when r>>a ? Also, give the direction of elctric field w.r.t. electric dipole.

A farmer has a supply of chemical fertilizer of type A which contains 10 % nitrogen and 6% phosphoric acis and type B fertilizer which contains 5% nitrogen and 10% phosphoric acid. After testing the soil condition of a field, it is found that at least 14 kg of nitrogen and 14 kg of phosphoric acid are required for a good crop. The fertilizer type A costs Rs 5 per kg and type B Rs 3 per kg. How many kilograms of each fertilizer should be used to meet the requirements and the cost be minimum? Using LPP, solve the above problem graphically.