Question

The percentages of various categories of workers in a state are given in the following table.

catergories	Cultivators	Agriculture Laboures	Industrial Workers	Commercial Workers	Others
% of workers	40	25	12.5	10	12.5

Present the information in the form of a pie chart

Answer 1

Here, total workers = 100 %

So,

The central angle = \(\frac{component\,value}{100}\times360^\circ\)

Hence, 

the central angle for each activity will be calculated as follows

Category	Persentage of workers	Sector angle (degree)
Cultivators	40	40/100 x 360 = 144
Agricultural laborers	25	25/100 x 360 = 90
Industrial workers	12.5	12.5/100 x 360 = 45
Commercial workers	10	10/100 x 360 = 36
Others	12.5	12.5/100 x 360 = 45

Steps for construction of representation of data in pie chart

Step 1: Draw the circle of appropriate radius. 

Step 2 : Choose a radius anywhere inside the circle. 

Step 3 : Now draw a sector of calculated component’s central angle. It is always preferable to choose component with largest central angle first and then continue in descending order of magnitude of their central angle. 

Step 4: After drawing sectors, shade them with different colours and label them as shown in the figure.