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The length of a rectangle is increased by 25%. What percentage should the width be decreased so that the area of the rectangle remains unchanged?

The length of a rectangle is increased by 25%. What percentage should the width be decreased so that the area of the rectangle remains unchanged? Correct Answer 20%

Hints : Let, length = 100x and width = 100y And z% was decreased from width So, 100x × 100y = 125x ( 100y - z) 10000xy = 12500xy - 125xz 125xz = 2500xy z = 20y অতএব, 20% decreased

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