Correct Answer - Option 2 : 36 cm
The radius of the first circle = 14 cm.
The radius of the second circle is 28.56% greater than the radius of 1st circle.
Diameter of a circle = 2 × radius of a circle.
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.