The length of a room is two times its breadth and contains 490meter cube of air. If the cost of papering its four walls at Rs. 14 per meter square is Rs. 2940. Find the cost of carpeting its floor at rs. 4000 per meter square​

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing