Question

machine required that room temperature be lowered from 42 degree Celsius at the rate of 60 degree Celsius every half and hour what will be the room temperature in 3 hours after the progress begin
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Answer 1

Step-by-step explanation:

Initial temperature = 40°c

Room temperature decreases at 5°c per hour

• Temperature change in 1 hour = - 5°c

Temperature change in 10 hours = - 5×10°c = - 50°c

• Room temperature after 10 hours = initial temperature+ temperature change in 10 hours = 40+(-50) = 40-50=(-40+50)=(50-40)=10°c

• Room temperature after 10 hours = -10°c