Question

In one day the sales (in rupees) of different items of a baker's shop are given below:

Items	Ordinary bread	Fruit bread	Cakes and Pastries	Biscuits	Others	Total
Sales (in Rs)	260	40	100	60	20	480

Draw a pie-chart representing the above sales.

Answer 1

We know:
Central angle of a component = (component value/sum of component values $\times$ 360)
Here, total sales = Rs 480
Thus, the central angle for each component can be calculated as follows:

Item	Sale (in Rs)	Sector angle
Ordinary bread	260	260/480 $\times$ 360 = 195
Fruit bread	40	40/480 $\times$ 360 = 30
Cakes and pastries	100	100/480 $\times$ 360 = 75
Biscuits	60	60/480 $\times$ 360 = 45
Others	20	20/480 $\times$ 360 = 15

Now, the pie chat representing the given data can be constructed by following the steps below:
Step 1 : Draw circle of an appropriate radius.
Step 2 : Draw a vertical radius of the circle drawn in step 1.
Step 3 : Choose the largest central angle. Here, the largest central angle is 195^o. Draw a sector with the central angle 195^o in such a way that one of its radii coincides with the radius drawn in step 2 and another radius is in its counter clockwise direction.
Step 4 : Construct other sectors representing other items in the clockwise direction in the descending order of magnitudes of their central angles.
​Step 5 : Shade the sectors with different colours and label them, as shown as in the figure below.​​