If sides of a square is increased by 33%, then find the percentage change in its area.
Answer & explanation
Correct answer: option 4
Total increased % in area = r% + r% + \(\frac{r × r}{100}\) %
= 33% + 33% + \(\frac{33× 33}{100}\)%
=66% + 10.89% ⇒ 76.89%