This is the answer for your problem to summarize it is 16 .
<span>I think first that the 64 h should be in parantheses so v=sqrt(v*h) where sqrt means square root.
If it falls 75 feet, then here h is 75 ft.
Then v=sqrt(64*75)=sqrt (4800)=69.282.
Rounded to the nearest tenth our answer would be 69.3 ft/sec.</span>
Given the formula for circumference is