To solve this problem it is necessary to take into account the concepts of conversion of Temperature Units.
In the international system, the centigrade degree is equivalent to
[tex](x\°F - 32) *\frac{5}{9} = y\°C[/tex]
For Sun day we have that the total change in Temperature is given by
Initial temperature [tex]T_i= 15\°C[/tex]
Final Temperature [tex]T_f = 30\°C[/tex]
Change in Temperature [tex]\Delta T = T_f-T_i =30-15=15\°C[/tex]
For winter day we have
Initial temperature [tex]T_i= 0\°F \Rightarrow (0\°F - 32) * 5/9 = -17.7\°C[/tex]
Final Temperature [tex]T_f = 15\°C\Rightarrow (15\°F - 32) * 5/9 = -9.4\°C[/tex]
Change in Temperature [tex]\Delta T = -9.4-(-17.7) = 8.34\°C[/tex]
Therefore the change in sunny day is grater that change in Winter day
