2017 · Q117
The area of the smallest circle which contains a square of area 4 cm² inside is
General Mental Ability, Quantitative Aptitude and StatisticsNumber system and arithmetic
- A𝜋 cm²
- B2𝜋 cm²
- C3𝜋 cm²
- D4𝜋 cm²
Explanation
A square of area 4 cm^2 has side 2 cm and diagonal 2*sqrt(2) cm. The smallest containing circle has the diagonal as diameter, so radius = sqrt(2) cm and area = pi x (sqrt(2))^2 = 2*pi cm^2. Hence B.