The initial temperature of a substance is 5oC. It is decreasing by 1oC in every 5 minutes.
(a) What will its temperature after 25 minutes?
(b) How long will it take to achieve (-15oC)?
Answers
Answered by
3
Answer:
(a) After 25 minutes the temperature will be 0°C.
(b) It will take 100 minutes i.e., 1 hour and 40 minutes.
Answered by
3
Answer:
(a) 25/5=5
initially it was 5°C and 5° decreases....so the present temperature will be 0° C
(b) 5°C to -15°C covers 20 degree.
20/5=4
5°C decreases in 25 mins
20 °= 25*4=100mins
1 hr 40mins
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