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 Note : 
- Calculators are allowed.
 
- All the numbers given are real numbers.
 
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For the convenience of the students, figures 
                  and diagrams are provided. All of them lie in a plane unless 
                  stated otherwise. They are also drawn accurately, to the highest 
                  degree possible. But there may be cases when it is indicated 
                  that the figure/diagram is not drawn to scale. 
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