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?
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Answer 1

Answer:

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Step-by-step explanation:

Time = 18 / 2 = 9 hours. 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

Answer 2

Answer:

Temperature at 12 noon was 10°C above zero.

decreases at a rate of 2°C per hour.

time taken for 8°C below zero temperature .

time= 10°+8°C=18°C

2°C per hours

18÷2=9hrs

temperature at mid-night

12hrs× 2°C per hours

=24°C below zero at mid-night.