Question : In measuring the sides of a rectangle, there is an excess of 5% on one side and a 2% deficit on the other. Then the error percentage in the area is:
Option 1: 3.3%
Option 2: 3.0%
Option 3: 2.9%
Option 4: 2.7%
Correct Answer: 2.9%
Solution :
Given: In measuring the sides of a rectangle, there is an excess of 5% on one side and a 2% deficit on the other.
We will use the successive percentage change formula.
$\therefore$ Required percentage = $(5-2-\frac{5×2}{100})=(3-0.1)=2.9$%
Hence, the correct answer is 2.9%.
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