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If the equation of the base of an equila...

If the equation of the base of an equilateral triangle is `2x - y=1` and the vertex is `(-1,2),` then the length of a side of the triangle is-

A

`sqrt((20)/(3))`

B

`(2)/(sqrt15)`

C

`sqrt((8)/(15))`

D

`sqrt((15)/(2))`

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The correct Answer is:
A
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