Eduprobe
Question:
Certain quantity of water cools from 70°C to 60°C in the first 5 minutes and to 54°C in the next 5 minutes. The temperature of the surroundings is ?
20oC
45oC
42oC
10oC
Solution:
60�=−K(65−T)5405−K(57−T)
20oC
45oC
42oC
10oC
60�=−K(65−T)5405−K(57−T)