If √3 = 1.732, then the approximate value of 1/√3

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If √3 = 1.732, then the approximate value of 1/√3 is ?

1. 0.617
2. 0.313
3. 0.577
4. 0.173

Correct Option: C

1/√3 = 1/√3 x (√3 / √3)
= √3/3
= 1.732 / 3
= 0.577