$\"\"$

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Newtons Law of Cooling is $\"\"$

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Here $\"\"$ is the temperature of the object and $\"\"$ is the surrondings temperature.

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Change in temperature $\"\"$ .

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At the intital time $\"\"$

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$\"\"$ and $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in the equation $\"\"$ .

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$\"\"$ .

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The general equation is $\"\"$ .

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Substitute $\"\"$ in the above equation.

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$\"\"$

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$\"\"$

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At $\"\"$ the temperature is $\"\"$ .

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Hence, $\"\"$ and $\"\"$ .

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Hence $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute $\"\"$ in the equation $\"\"$ at $\"\"$ .

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$\"\"$

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$\"\"$

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Find the time ,when the temperature reaches $\"\"$ .

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The equation is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Therefore,the pigs temperature reaches $\"\"$ after $\"\"$ .

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$\"\"$

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The pigs temperature reaches $\"\"$ after $\"\"$ .