Question

3. A cooling machine requires that room temperature be lowered from 52°C at the rate of 6°C every half an hour. What will be the room temperature in 5 hours after the process begins?​

Answer 1

Step-by-step explanation:

Starting temperature = 50 C

Rate of cooling = 5 C every hour

Temperature after 1 hour = 50 - 1 $\times$ 5 = 45 C

Temperature after 2 hours 50 - 2 $\times$ 5 = 40 C

Similarly, temperature after 8 hours = 50 - 8 $\times$ 5 = 50 - 40 = 10 C