The maximum height the ball reaches is 65.92 m.
The time taken for the ball to reach the maximum height is 3.06 seconds.
The time taken for the ball to hit the ground is 6.12 seconds.
<h3>maximum height the ball reaches</h3>
The maximum height the ball reaches is calculated as follows;
s(t) = -4.9t² + 30t + 20
at maximum height, final velocity = 0
v = 0
ds/dt = -9.8t + 30 = 0
9.8t = 30
t = 30/9.8
t = 3.06 seconds
s(3.06) = -4.9(3.06)² + 30(3.06) + 20
s(3.06) = 65.92 m
Thus, the time taken for the ball to reach the maximum height is 3.06 seconds.
<h3>Time of flight of the ball</h3>
The time taken for the ball to hit is the total time of flight = 2 x 3.06 seconds = 6.12 seconds.
Thus, the maximum height the ball reaches is 65.92 m.
The time taken for the ball to reach the maximum height is 3.06 seconds.
The time taken for the ball to hit the ground is 6.12 seconds.
Learn more about maximum height here: brainly.com/question/12446886
#SPJ1
is 60000 so to find the answer do 420000/60000 to get a final time of 7 hours.