If each side of a square is increased by 20%. Find the percentage increase in its area.
Answer & explanation
Correct answer: option 4
20% = \(\frac{1}{5}\)
Ratio of sides⇒ Actual : New = 5 : 6
Area of square = a2
Ratio of area⇒ Actual : New = 52 : 62 = 25 : 36
Area increased by = 36 - 25 = 11
Increased percentage = \(\frac{11}{25}\) × 100% = 44%