The length of a side of an equilateral triangle is 8 cm The area of the region lying between the cir...........

Quantitative Aptitude (CGL) Mensuration 3D

The length of a side of an equilateral triangle is 8 cm. The area of the region lying between the circum circle and the incircle of the triangle is (use: p = 22/7)

50 1/7cm²

50 2/7cm²

75 1/7cm²

75 2/7cm²

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Explanation:

Side of equilateral ? = a cm
In circle radius =a/2√3=8/2√3
−4/√3
Circum radius =a/√3=8√3
Area bounded by both circle is
=π((8/√3)^2−(4/√3)^2)
=227(64/3−16/3)=22/7(48/3)
=22×16/7=50 2/7cm²