Answer:
It will take 1.789 sec
Explanation:
We have given height h = 30 m
Initial velocity u = 8 m/SEC
Acceleration due to gravity [tex]g=9.8m/sec^2[/tex]
Now according to second equation of motion [tex]h=ut+\frac{1}{2}gt^2[/tex][tex]30=8t+4.9t^2[/tex]
[tex]4.9t^2+8t-30=0[/tex]
After solving we get t = -3.42 sec and t = 1.789 sec
As negative time is not possible so time will be 1.789 sec
