CSAT 2021

Q. A pie diagram shows the percentage distribution of proteins, water and on the dry elements in the human body.

Given that proteins correspond to 16% and water corresponds to 70%. If both proteins and the other dry elements correspond to p%, then what is the central angle of the sector representing p on the pie diagram?

(a) 54°
(b) 96°
(c) 108°
(d) 120°
Correct Answer: (c) 108°

Question from UPSC Prelims 2021 CSAT Paper

Explanation :

Pie Chart Analysis

A pie chart represents 100% of the data as a full circle with 360 degrees. In this case, proteins correspond to 16% and water corresponds to 70%, so the other dry elements correspond to 100% – 16% – 70% = 14%. Since p represents the sum of proteins and other dry elements, p = 16% + 14% = 30%.

Since p represents 30% of the data, the central angle of the sector representing p on the pie diagram is (30/100) * 360 = 108 degrees.

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