The temperature of a body falls from `40^(@)C` to `30^(@)C` in 10 min when placed in a surrounding of constant temperature `15^(@)C`. Find the time taken for the temperature of the body to becomes `20^(@)C`

Explanation

To solve the problem, we will use Newton's Law of Cooling, which states that the rate of change of temperature of an object is proportional to the difference between its temperature and the ambient temperature. The formula can be expressed as:

\[ \frac{dT}{dt} = -k(T - T_s) \]

Where:
- \( T \) is the temperature of the body,
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