If radius of a circle is increased by 5%, then the increase in its area is:
Answer & explanation
Correct answer: option 1
Total increased % in area = r% + r% + \(\frac{r × r}{100}\) %
= 5% + 5% + \(\frac{5× 5}{100}\)%
=10% + .25% ⇒ 10.25%
If radius of a circle is increased by 5%, then the increase in its area is:
Correct answer: option 1
Total increased % in area = r% + r% + \(\frac{r × r}{100}\) %
= 5% + 5% + \(\frac{5× 5}{100}\)%
=10% + .25% ⇒ 10.25%