Question
The temperature of a body first rises by 25∘C and then falls by 32∘C. Find the final temperature of the body, if its initial temperature is : [2 MARKS]
(i) 0∘C
(ii) −20∘C
Answer: Option A
:
Each option: 1 Mark
(i) Final temperature
⇒0∘C+(+25∘C)+(−32∘C)
⇒0∘C+25∘C−32∘C
⇒−7∘C
(ii) Final temperature
⇒−20∘C+(+25∘C)+(−32∘C)
⇒−20∘C+25∘C−32∘C
⇒−27∘C
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:
Each option: 1 Mark
(i) Final temperature
⇒0∘C+(+25∘C)+(−32∘C)
⇒0∘C+25∘C−32∘C
⇒−7∘C
(ii) Final temperature
⇒−20∘C+(+25∘C)+(−32∘C)
⇒−20∘C+25∘C−32∘C
⇒−27∘C
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