Explanation:
KE =1/2 MV^2
HOPE YOU COULD SOLVE FROM NOW..
D) all of the above is the answer
Answer: The height of the pile increasing is increasing at 
Explanation:
Given
Rate at which gravel is being dumped , 
=>Rate of increase of volume of cone=
If height of the cone at any instant is h then the diameter of cone is also h
Volume of cone , 
Now differentiate both sides w.r.t time(t)

Therefore at h = 9 ft

=>
Thus the height of the pile increasing is increasing at 
4)Both B and D.This happens becaus3 at the ceryain time, A experiences a flood tide causing the waters to come near it.And since B and D are the closest coastlines they are affected the most.