00:01
In the given question, we'll be using the newton's law of cooling, the newton's law of cooling.
00:11
According to this law, it clearly states that the rate of cooling is directly proportional to the change in temperature.
00:21
And we know that the change in temperature, which is delta, is given by the temperature of the body minus the temperature of the surroundings.
00:30
So this is how del t can be defined.
00:34
Now del theta upon del t is directly proportional to change in the temperature.
00:44
So this is how the law can be concluded.
00:47
Furthermore, we know that del theta is the theta initial minus the theta final.
00:53
So this is the change in temperature upon del t which is a change in time.
00:58
Delt small t is directly is equal to a constant let's take it as k into t b minus t s so this is the primary equation that we'll be using since one case has already been given to us using that case we'll be finding out the value of k first and then use it to find out our final answer so now to find out k we need to first know that what we will take t b as because t s of surrounding has already been given to us as 30 degrees celsius...