Question

the temperature of a substance decreases at the rate of 2°C per 10 minutes . the temperature of the substance at 5o clock was 10°. At what time will be the temperature of the substance be 4°C below zero​

Answer 1

Answer:

For every 10 mins, there is a drop of 2 degree Celsius. So 70 minutes will be required for the substance to reach -4 degree Celsius