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In an equilateral triangle 3 coins of ra...

In an equilateral triangle 3 coins of radii 1 unit each are kept so that they touch each other and also the sides of the triangle. Are of the triangle is- `4+2sqrt(3)` b. `6+4sqrt(3)` c. `12+(7sqrt(3))/4` d. `3+(7sqrt(3))/4`

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