Each side of a rectangular field is increased by 10%. Then the percentage increase in the area of the field is:
Answer & explanation
Correct answer: option 4
10% = \(\frac{1}{10}\)
Old : New
Length 10 : 11
Breadth 10 : 11
------------------------------------------------
Area 100 : 121
{ Area of Rectangle = Length × Breadth }
Percentage increase of Area = \(\frac{121}{100}\) × 100
= 21%