Correct Answer - Option 2 : 36 cm

**Given:**

The radius of the first circle = 14 cm.

The radius of the second circle is 28.56% greater than the radius of 1st circle.

**Formula:**

Diameter of a circle = 2 × radius of a circle.

**Calculation:**

Since 28.56% = 2/7

So, if the radius of the first circle is 7 units then the radius of the second circle would be 9 units.

Since 7 units given → 14

So, 9 units would be → 18

So, the radius of the second circle would be 18 cm

Hence diameter of the circle would be two times its radius = 2 × 18 = 36 cm.

**∴ The diameter of a circle which radius is 28.56% greater than the radius of another circle of radius 14 cm is 36 cm.**