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Question

If the concrete roof of a house is replaced by a polished metallic surface, the temperature inside the house will ___________.
  1. increase
  2. decrease
  3. None of the above
  4. remain unchanged.


Solution

The correct option is B decrease
If the concrete roof of a house is replaced by a polished metallic surface, it reflects most of the sun rays which fall on it. 
Polished metal surface is a good reflector of radiant heat energy coming from the sun. Hence it helps to reduce the temperature inside the house.

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