MathematicsThe percentage of the world population of countries is given in the following table. Find the value of ‘a’. If a pie diagram is to be drawn, what would be the measure of the central angle for the USA?

The percentage of the world population of countries is given in the following table. Find the value of ‘a’. If a pie diagram is to be drawn, what would be the measure of the central angle for the USA?


  1. A
    60°
  2. B
    45°
  3. C
    62°
  4. D
    72° 

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    Solution:

    Here, we use,
    Percentage of population = 100
    Now, we need to find ‘a’,
    Thus, Percentage of population in Russia and the USA is 20.
    Here, we using
    Central angle of India:
    Central angle of China:
    Central angle of USA:
    We have the same component in Russia. That is, 20.
    Central angel of others:
    Here, drawing a pie chart we get:
     Therefore, the Central angle of the USA: Hence, Option (4) is the correct answer.
     
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