the temperature of a substance decrease at the rate of 2 degree centigrade per 10 minute .the temperature of the substance at 5 'o'clock was 10℃.at what time will the temperature of the substance be 4℃below zero.
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At 5 ‘o clock the substance is at 10 degrees Celsius and decreases by 2 degrees Celsius every ten minutes.
It will take 70 minutes to be -4 degrees Celsius
At 6:10 the temperature will be -4 degrees Celsius.
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