Two plates are connected by fillet welds of size $10$ mm and subjected to tension, as shown in the figure. The thickness of each plate is $12$ mm. The yield stress and the ultimate tensile stress of steel are $250$ MPa and $410$ MPa, respectively. The welding is done in the workshop ($\gamma _{mu} = 1.25$).

As per the Limit State Method of $IS \: 800:2007$, the minimum length (rounded off to the nearest higher multiple of $5$ mm) of each weld to transmit a force $P$ equal to $270$ kN (factored) is

1. $90$ mm
2. $105$ mm
3. $100$ mm
4. $115$ mm