The temperature at 12 noon was 10°C above zero. If it decreses
at the rate of 2°C per hour until mid-night, at what time would
the temperature be 8°C below zero ? What would be the
temperature at mid-night?
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Answer:
Step-by-step explanation:
Solution : Temperature at 12 Noon = 10°C above 0°C = 10°C
It decreases at 2° per hour.
Final temperature = 8°C below 0 = -8°C
Change in temperature = 10 - ( -8 ) = 18°C.
Rate of decrease = 2° per hour.
Time = 18 / 2 = 9 hours.
So, Time at which temperature would be 8°C below zero = 12:00 + 9:00 = 21:00
So, the time at which temperature goes 8°C below 0 is 9:00 PM.
Also, The temperature at 12 :00 PM = 10° C, As temperature decreases at 2°C,
Temperature at mid night = 10° C - 2 ( 12 ) = 10 - 24 = -14° C.
Hope helped!
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