Answer: [tex]25^{o}F [/tex]
Temperature is a measure of hotness or coldness. Different scales are used to measure it like - celsius, fahrenheit and kelvin.
The temperature at 5 p.m. is [tex] 20^{o}F[/tex] and at 10 p.m. it is [tex] -5^{o}F [/tex]
We can determine the fall in temperature by calculating the difference in the temperature.
[tex] \delta T=20^{o}F-(-5^{o}F)\\ \Rightarrow \delta T=25^{o}F [/tex]
Hence, the fall in temperature is [tex]25^{o}F [/tex]
