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?

A 30%
B 25%
C 20%
D 35%

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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#গণিত #শতকরা (Percentage) #Janata Bank Ltd #Janata Bank Ltd - Executive Officer - 27.7.2012

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