The temperature of a place at 8 pm is 15 degree Celsius if it decreases at the rate of 2 degree Celsius per hour find at what time temperature would be -5 degree Celsius?
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The temperature -5° Celsius is at 5:30 am
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Answer:
6 am
Step-by-step explanation:
Temp. decreases 2°C in 1 hour
=> temp. decreases 1°C in 1/2 an hour
now, 15° above 0 & -5° below 0 => 15 +5=20
So the time at 20°C = 1/2 ×20=10 hours
=> Total time taken = 8pm + 10 hours = 18 hours
=> 6 am
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