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A cup of tea cools from 80°C to 60°C in one minute. The ambient temperature is 30°C. in cooling from 60°C to 50°C, it will take. (a) 50 sec (b) 90 sec (c) 60 sec (d) 30 sec

A cup of tea cools from 80°C to 60°C in one minute. The ambient temperature is 30°C. in cooling from 60°C to 50°C, it will take.
(a) 50 sec
(b) 90 sec
(c) 60 sec
(d) 30 sec

Grade:Upto college level

1 Answers

Vikas TU
14149 Points
11 months ago
Ambient temperature is the temperature of the surrounding.
At this point, the ambient temperature is 30 °C
The initial temperature is:80°C
The temperature falls to 60°C in one minute.
Meaning the rate of cooling is (80-60)°C per minute. Which is :20°C per minute.
In the next one minute the temperature falls to:
60-20=40°C
SO the temperature of the body when we consider the ambient temperature
Is 30+40=70°C
 

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