The maximum height attained by the ball is 60 m.
We know that the maximum height can be obtained from the equation;
v^2 = u^2 - 2gh
v = final velocity
u = initial velocity
g = acceleration due to gravity
h = maximum height
Since the final velocity is 0 m/s at maximum height then;
u^2 = 2gh
h = u^2/2g
h = (34.3)^2/2 * 9.8
h = 60 m
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