Question

The time of flight of projectile motion is given by the expression?

Answer 1

The time of flight of projectile motion is given by the expression (see https://courses.lumenlearning.com/boundless-physics/chapter/projectile-motion/):

$$T = \dfrac{2u\sin\theta}{g}$$

where $u$ is the initial speed, $\theta$ is the launch angle, and $g$ is the gravitational acceleration.