Question

5. The temperature at 12 noon was 10°C above zero. If it decreases at the rate of 2°C
per hour until midnight, at what time would the temperature be 8°C below zero?
What would be the temperature at mid-night?​

Answer 1

Answer:

Temperature at 12 noon =10°C

Rate of decrease of temperature per hour=2°

Time at temp. -8°=?

Sol:

Difference of temp.=10-(-8)=18°C

temperature decreases 2° per hour

Therefore 18÷2=9

so time will be 9pm