3. A metal sphere cools at the rate of 3 degrees Celsius per minute when its temperature is 50 degrees Celsius. Find the rate of cooling as 40 degrees Celsius if the temperature of the surroundings is 25 degrees Celsius.

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A: As per guidelines we need to answer only first question so please repost rest questions separately

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A: In the question given, It is asked to determine the length of line AB,BC and area of Traverse