The surface area increases by a factor of 4. 2^2= 4.
The area of the long side is 3×1= 3cm^2 on the small prism.
The area of the long side is 6×2= 12cm^2 on the large prism.
12/3= 4.

Finding the radius,

Plugging in our values,

Rounding to the nearest whol number,

1.0% exactly 0.9743. I hope I helped!
The answer is B. 100/5=20 hope i helped