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At a depth of [tex]x[/tex] metres, the temperature of the water in an ocean is [tex]T^{\circ} C[/tex]. At depths below 900 metres, [tex]T[/tex] is inversely proportional to [tex]x[/tex].

[tex]T[/tex] is given by:

[tex]T = \frac{4500}{x}[/tex]

Work out the difference in the temperature of the water at a depth of 1200 metres and the temperature of the water at a depth of 3750 metres.

Answer :

Let's solve the problem step-by-step.

We're given that the temperature [tex]\( T \)[/tex] of the water in the ocean is inversely proportional to the depth [tex]\( x \)[/tex] in meters. The relationship is given by the formula:

[tex]\[ T = \frac{4500}{x} \][/tex]

We need to find the difference in temperature of the water at two different depths: 1200 meters and 3750 meters.

### Step 1: Calculate the temperature at a depth of 1200 meters.
Using the formula, substitute [tex]\( x = 1200 \)[/tex]:

[tex]\[ T = \frac{4500}{1200} \][/tex]

This calculation gives a water temperature of 3.75°C at 1200 meters depth.

### Step 2: Calculate the temperature at a depth of 3750 meters.
Similarly, substitute [tex]\( x = 3750 \)[/tex] into the formula:

[tex]\[ T = \frac{4500}{3750} \][/tex]

This calculation gives a water temperature of 1.2°C at 3750 meters depth.

### Step 3: Find the difference in temperature between the two depths.
To find the difference in temperature, subtract the temperature at 3750 meters from the temperature at 1200 meters:

[tex]\[ \text{Difference} = 3.75 - 1.2 \][/tex]

This results in a difference of 2.55°C.

Therefore, the difference in temperature between the water at a depth of 1200 meters and at a depth of 3750 meters is 2.55°C.

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