In Young's double slit experiment, carried out with light of wavelength \( 5000 \,\text{ Å}
\), the distance between the slits is \( 0.3 \, \text{mm} \) and the screen is at \( 200 \, \text{cm} \) from the slits. The central maximum is at \( x = 0 \, \text{cm} \). The value of \( x \) for third maxima is ________ \( \text{mm} \).
