Important Question for CBSE board Exam Class 10

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 1. Draw the graph of the pair of equations 2x + y = 4 and 2x – y = 4. Write the vertices of the triangle formed by these lines and the y-axis. Also find the area of this triangle.



2. 6/5, a , 4 are in Ap find the value of a 



3. How many terms of the AP : 9, 17, 25, ... must be taken to give a sum 636? 



4. The shadow of a tower standing on a level plane is found to be 50 m longer when Sun’s elevation is 30° than when it is 60°. Find the height of the tower





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