Question

When a cold drink is taken from a refrigerator, its temperature is 5°C. After 25 minutes in a 20°C room its temperature has increased to 10°C. (Round your answers to two decimal places.) (a) What is the temperature of the drink after 40 minutes? 12.51 Incorrect: Your answer is incorrect. °C (b) When will its temperature be 12°C?

Answer 1

Answer:

a) 16 °C

b) 30 min

Explanation:

a) you can calculate the increase per rule of three

25 min - 10°C

     x     - 12 °C

x= (12 x 25) /10 = 30 min

b) also

25 min - 10°C

40 min -   x

x= (40 x 10) /25 = 16 °C

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