Answers

2016-04-27T15:06:11+05:30
The answer is 2.5×5
that's simple as hell?!!
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2016-04-28T15:33:54+05:30
Present temperature of the room= 20°c
its decreasing rate= 2.5°c per hour.
its temperature decreased after 5 hours= 2.5*5= 12.5°c 
temperature after 5 hours= 20-12.5= 7.5°c.
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