General Aptitude › Percentage › Question #4564
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QIf the length and breadth of a square are increased by 40% and 30% respectively, how much does the area of the resulting rectangle exceed the area of the original square?

ID: #4564 Percentage 210 views
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  • A 65% ✔ ✖
  • B 82% ✔ ✖
  • C 78% ✔ ✖
  • D 98% ✔ ✖
Correct Answer

Explanation


We can define a variable "z" as the net percent change in area and 
set up the following equation:

z = (x + y + xy/100)%
= (40 + 30 + (40 * 30)/100)%
= 82%

This equation shows that the net percent change in area is 82%.
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