If a side of a square is increased by 20%, then its area will increase by:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 44%.
Let the side of the square be 10 units.
Area = 10 × 10 = 100 sq. unit
According to the question–
New side = 10 + 2 = 12 units
New area = 12 × 12 = 144 sq. units
Increase in area = 144 − 100 = 44 sq. units
Increase in area % = (44/100) ×100 = 44%