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  1. Three coins of the same size (radius 1 cm) are placed on a table such that each of them touches the other two. The area enclosed by the coins is
    1. π
      - √3cm²
      2
    2. 3 -
      π
      cm²
      2
    3. 2√3 -
      π
      cm²
      2
    4. 3√3 -
      π
      cm²
      2
Correct Option: B

Using Rule 6 AND 17,

Obviously, the triangle ABC will be equilateral.
AB = BC = CA = 2 cm.
Area of ∆ ABC

=
3
× 2 × 2
4

= √3 cm²
Then, area ‘A’ of the three sectors each of angle 60° in a circle of radius 1 cm.
A = 3 ×
60
× π × 1 =
π
3602

∴ Area of the shaded portion
= 3 -
π
cm².
2



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