Question

.A certain freezing process requires that room temperature be lowered from 40º C at the rate of 5º C every hour when will the temperature be (-20)oC

Answer 1

Answer:

initial temp. = 40 degree

final temp. =-20

Amount of lowering = 40-(-20)= 40 + 20 = 60 degree

Time = distance/speed = 60/5 = 12 hour

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Step-by-step explanation: