A projectile has range on a horizontal plane equal to three times the maximum height attained by it. If u be the velocity of projection of the projectile, then its time of flight is:
1
\(\frac{{8u}}{{5g}}\)
2
\(\frac{{4u}}{{5g}}\)
3
\(\frac{{2u}}{{g}}\)
4
\(\frac{{u}}{{g}}\)