If each side of a square is increased by 25%, find the percentage change in its area.
Let each side of the square be a. Then, area = .a2New side =125a100=5a4. New area = 5a42 = 25a216
Increase in area = 25a216-a2=9a216Increase% = 9a216*1a2*100 % = 56.25%.
The lengths of the diagonals of a rhombus are 16 cm and 12 cm. Its area is:
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