Quantitative Aptitude
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Percentage & Averages
Question
14 out of 20
If the length of rectangle is increased by 20% and breadth is decreased by 10% then what will be impact on perimeter.
A  10% increase 
B  20% decrease 
C  5% increase 
D  8% increase 
E  None of these

Ans. D Let previous length and breadth be 100 cm each then perimeter = 2(100+100) = 400 cm
After changing new perimeter = 2 (120 + 90) = 420 cm
So change% be =
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