An object approaches a convergent lens from the left of the lens with a uniform speed $5 \mathrm{m} {\mathrm{s}}^{-1}$ and stops at the focus, the image

The following figure shows a beam of light converging at point $P$. When a concave lens of focal length $16 \mathrm{cm}$ is introduced in the path of the beam at a place shown by dotted line such that $OP$ becomes the axis of the lens, the beam converges at a distance $x$ from the lens. The value of $x$ will be equal to