The number of hours, spent by a school boy on different activities in a working day, is given below:
|Number of hours||8||7||4||2||3||24|
Present the information in the form of a pie-chart.
Central angle of a component = (component value / sum of component values 360)
Here, total number of hours = 24
Thus, the central angle for each component can be calculated as follows:
|Activity||Number of hours||Sector angle|
|Sleep||8||8/24360 = 120o|
|School||7||7/24360 = 105o|
|Home||4||4/24360 = 60o|
|Play||2||2/24360 = 30o|
|Others||3||3/24360 = 45o|
Now, the pie chat that represents the given data can be constructed by following the steps given below:
Step 1 : Draw a 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 120o. Draw a sector with the central angle 120o 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 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.
Video Tutorials For All Subjects
- Concept of Pie Graph (Or a Circle-graph)