The diameter of a circle is increased by 100%. What is the percentage…

Let, diameter of the circle be 14 cm

So, area = πr² = \(\frac{22 }{ 7}\) x 7 x 7 = 154 cm²

Now, diameter is increased by 100% i.e. 28 cm

So, area = πr² = \(\frac{22 }{ 7}\) x 14 x 14 = 616 cm²

Increase in the area = 462 cm²

Percentage increase = \(\frac{ 462}{154 }\) x 100 = 300%