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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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