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प्रश्न
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.
उत्तर
We know:
Central angle of a component = (component value/sum of component values x 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 x 360 = 195 |
| Fruit bread | 40 | 40/480 x 360 = 30 |
| Cakes and pastries | 100 | 100/480 x 360 = 75 |
| Biscuits | 60 | 60/480 x 360 = 45 |
| Others | 20 | 20/480 x 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 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.
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