Question

For drinks during the day, Peter has a cup of hot coffee, at a temperature of about 90 ºC, and a cup of cold mineral water, with a temperature of about 5 ºC. The cups are of identical type and size and the volume of each drink is the same. Peter leaves the cups sitting in a room where the temperature is about 20 ºC. What are the temperatures of the coffee and the mineral water likely to be after 10 minutes?
a. 70 ºC and 10 ºC
b. 90 ºC and 5 ºC
c. 70 ºC and 25 ºC
d. 20 ºC and 20 ºC
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Answer 1

Answer:

c)

Step-by-step explanation:

Temp. of hot coffee=90-20

=70

Temp. of cold coffee=5+20

=25

So, it matches with c

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Answer 2

Answer:

The above given answer is wrong

Step-by-step explanation:

the correct answer is that the temperature of both the coffee as well as the mineral water will become 20°C . i.e option d.

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