If a projectile crosses two walls of equal height `h` symmetrically as shown in the fig.Choose the correct statement (s) `(g=10m//s^(2))`

Options

A. The time of flight is `8 sec`
B. The height of each wall is `60 m`
C. The maximum height of projectile is `80m`
D. All the above

Answer

D

Explanation

`T=6+2=8sec,h=g/8(8^(2)-4^(2))`
`H=g/8(8^(2))`