The area of the region between two concentric circles is the difference between the area of the larger circle and the area of the smaller circle, given by $\pi(R^2 - r^2)$. In quantitative aptitude questions, $\pi$ is often approximated as 22/7 or 3.14. Check options to see if a numerical approximation is expected.
Two circles of same center have radius of 2 cm and 5 cm respectively. Then what is the area of region between larger and smaller circles?
Asked in GPSC Prelims CSP 1 2023 · Topic: Measurement/Unit (Physical Quantities (Fundamental and Derived))
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