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.
Central angle of a component = (component value/sum of component values
Here, total sales = Rs 480
Thus, the central angle for each component can be calculated as follows:
|Item||Sale (in Rs)||Sector angle|
|Cakes and pastries||100||100/480
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 195o. Draw a sector with the central angle 195o 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.