The square root of 1.96 equals to
If the ionic radii of K+ and F− are nearly the same (i.e 1.34 ˚A) then the atomic radii of K and F are respectively are
The pressure exerted by water (density = 103 kg/m3) on the bottom surface (2m × 4m) of tank having dimensions 2m × 4m × 2m is