the temperature of 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?

Question

the temperature of 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?

Shubham Chourasiya · Accepted Answer

Rate of decrement = 2c per hour 
 Difference in temp = 10 - ( -8) = 18  number of hours it will take will be 18 / 2 = 9 hours 
 At evening 9 , temp will be -8 deg C 
Hope this would have cleared your doubt