Exams › SSC CGL (Prelims) › General

A circular garden has a radius of 18 m. A 2.5 m wide pathway is constructed around it. What is the approximate area of the pathway?

1. 282 m²
2. 302 m²
3. 314 m²
4. 328 m²

Correct answer: 302 m²

Solution

The pathway forms a ring with inner radius 18 m and outer radius 20.5 m. Its area is $\pi(R^2-r^2)=\pi(20.5^2-18^2)=\pi(420.25-324)=96.25\pi\approx 302$ m².

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