The radius of a circle is increased by 30%, then area increased by?

44% 69% 34% 60%

69%

Using the formula for net effect = x% + x% + \(\frac{x\;× \;x}{100}\) % ⇒ Net Effect = 30% + 30% + \(\frac{30\;×\;30}{100}\)% = 69%