Question

The temperature of a town is -2^o Celsius at 4:00 A.M in the morning. As the day progresses, the temperature increases at an average rate of 2^o Celsius every 4 hours. What is the temperature at 4:00 P.M.?

• A. 0^o Celsius
• B. -1^o Celsius
• C. 4^o Celsius
• D. -4^o Celsius

Answer 1

The correct option is C

4^o Celsius

Temperature at 4.00 A.M. = -2^o Celsius

Rate of increase in temperature = 2^o Celsius every 4 hours

Total hours between 4:00 A.M. and 4:00 P.M. = 12 hours

12 hours means three times a period of 4 hours.

So, temperature increase after 12 hours = 2 x 3 = 6^o Celsius
Thus, temperature at 4.00 P.M. = -2 + 6 = 4^o Celsius