Answer
Find out the how long will it take the submarine to descend to the ocean floor
To proof
Formula
[tex]r = \frac{d}{t}[/tex]
where d = distance traveled (or descended),
r = rate of travel , t = time
As given
A submarine descends at a rate of 2.6 kilometers per hour. If the ocean floor is 6.24 kilometers below sea level .
put all the values in the above formula
[tex]2.6 = \frac{6.24}{t}[/tex]
[tex]t = \frac{6.24}{2.6}[/tex]
t = 2.4 hour
it take 2.4 hours the submarine to descend to the ocean floor .
Hence proved
Speed is the rate of change of distance over time.
It will take the submarine 2.4 hours to descend to the ocean floor
The speed is given as:
[tex]\mathbf{Speed = 2.6kmh^{-1}}[/tex]
Speed is calculated using:
[tex]\mathbf{Speed = \frac{distance}{time}}[/tex]
When distance = 6.24 km
[tex]\mathbf{Speed = \frac{6.24km}{Time}}[/tex]
Substitute [tex]\mathbf{Speed = 2.6kmh^{-1}}[/tex]
[tex]\mathbf{2.6kmh^{-1} = \frac{6.24km}{Time}}[/tex]
Make Time the subject
[tex]\mathbf{Time = \frac{6.24km}{2.6kmh^{-1}}}[/tex]
[tex]\mathbf{Time = 2.4h}[/tex]
Hence, it will take the submarine 2.4 hours to descend to the ocean floor
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