The Answer is= 7.8 x 10^4
C. 90 m
30m per second... and it takes 3 seconds
3x30= 90
Answer:
50.2 m
Explanation:
We can solve the problem by using the following SUVAT equation for the vertical position of the rock:

where
h is the initial height (the depth of the canyon), taking the bottom of the canyon as reference position
u = 0 is the initial velocity of the rock
t is the time
is the acceleration of gravity
When the rock reaches the bottom, t = 3.2 s and y = 0. Substituting these numbers and solving for h, we find the depth of the canyon:

H, I think. The oil has a lower density than the water, so after the 3 minutes it would float on top of the water.
IS any one going to answer this I need the answer also
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