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Study the following pie chart that shows the percentage-wise distribution of teachers who teach six different subjects, and answer the question given below. Total number of teachers = 1600 The central angle of teachers who teach Biology and Mathematics together is:

Study the following pie chart that shows the percentage-wise distribution of teachers who teach six different subjects, and answer the question given below. Total number of teachers = 1600 The central angle of teachers who teach Biology and Mathematics together is: Correct Answer 144° 

Subjects Number of teachers
Mathematics 25% of 1600 = 400
Physics 18% of 1600 = 288
Chemistry 18% of 1600 = 288
Economics 16% of 1600 = 256
Accountancy 8% of 1600 = 128
Biology 15% of 1600 = 240
 
 

 

Central angle of Biology and Mathematics teacher =  × 360

⇒ (640/1600) × 360

⇒144° 

∴ The central angle of teachers who teach Biology and Mathematics together is 144 ° 

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