Question

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
4°C below zero?What would be the
temperature at 9:00 pm ?​

Answer 1

Answer:

initial-final/rate of decrease=10-(-4)/2= 7

so after 7hrs it will be 4°C below zero

similarly

9=10-(x)/2=>18=10-x=>x= -8

so at 09:00 pm temperature would be -8°C

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