A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is:
Let original length = x and original breadth = y.
Decrease in area = xy - 80100x×90100y = (7/25)xy
Decrease % = (7/25)xy * (1/xy) * 100 = 28%
The lengths of the diagonals of a rhombus are 16 cm and 12 cm. Its area is:
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