A cannon ball has a range R on a horizontal plane. If h and h' are the greatest heights in the two paths for which this is possible, then
1
R = 4 \(\rm\sqrt{\left(h \ h^{\prime}\right)}\)
2
R = \(\rm\frac{4 h}{h^{\prime}}\)
3
R = 4 h h'
4
R = \(\rm\sqrt{\left(h \ h^{\prime}\right)}\)