Correct Answer - Option 4 : is decreased by 1%
Given:
Increment in length = 10%
Decrement in breadth = 10%
Formula used:
Using AB rule
Percentage change = (A + B + AB/100)%
Where A and B are successive percentage changes
Calculation:
A = 10% and B = -10%
Put the values in the formula
Percentage change = [10 – 10 + 10 (-10)/100]%
Percentage change = -1%
∴ The area of the new rectangle is decreased by 1%
