Question

The following table shows the expenditure incurred by a publisher in publishing a book:

Present the above data in the form of piechart.

Items	Paper	Printing	Binding	Advertising	Miscellaneous
Expenditure %	35%	20%	10%	5%	30%

Answer 1

Here, total expenditure = 100 %

So, 

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

Hence, 

the central angle for each activity will be calculated as follows

item	Expenditure (in %)	Sector angle (degree)
Paper	35	35/100 x 360 = 126
Printing	20	20/100 x 360 = 72
Binding	10	10/100 x 360 = 36
Advertising	5	5/100 x 360 = 18
Miscellaneous	30	30/100 x 360 = 108

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. S

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