The given figure shows a loop-the-loop track having radius 760 c m. A car without engine starts from a platform at a distance ' h ' above the top of…

The given figure shows a loop-the-loop track having radius $\displaystyle 760 c m$. A car without engine starts from a platform at a distance ' $\displaystyle h$ ' above the top of the loop and goes around the loop without falling off the track. The minimum value of ' $\displaystyle h$ ' required for a successful looping is \_\_\_\_ $\displaystyle c m$. (Ignore friction)