A solution is to be kept between 68°F and 77°F. What is
the range in temperature in degree Celsius (C) if the
Celsius/Fahrenheit (F) conversion formula is given by
Since the solution is to be kept between 68°F and 77°F,
68 < F < 77
Putting
we obtain
Thus, the required range of temperature in degree Celsius is between 20°C and 25°C.