The length of a rectangle is increased by 25% .By 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%

Let, Length 100 Width 100 So, area = 100×100 = 10,000Increased length  = 100×125100 = 125Let, New width  =  x ATQ,125×x  = 10,000⇒x = 10000125 = 80So, percentage decreased  = 100 - 80100×100 = 20%
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#গণিত #শতকরা (Percentage) #Bima Corporation #সাধারণ বীমা কর্পোরেশন - সহকারী ব্যবস্থাপক ১২.০৭.২০১৯

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