BLUE PRINT SA-II IX final

Question numbers 9 to 14 carry 2 marks each. 9. D and E are points on sides AB and AC respectively of Þ ABC such that ar (DBC) = ar (EBC). Prove that DE æBC. 10. An edge of a cube is increased by 10%. Find the percentage by which the surface area of the cube has increased. 11. Find the mode of the following data: ................
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