and 60°. Find the height of the tower. 6. Do all the parts : (a) Find the arithmetic mean from the following table : Marks obtained Number of students Below 5 3 Below 10 10 Below 15 25 Below 20 49 Below 25 65 Below 30 73 Below 35 78 Below 40 80 (b) Prove that
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90 is the answer
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