The side view of a cylinder is a square. If the height of the cylinder increases by 2 cm, the surface area will increase by 12.56

The side view of a cylinder is a square. If the height of the cylinder increases by 2 cm, the surface area will increase by 12.56

The diameter of the bottom surface of the cylinder is: 12.56 △ 2 △ 3.14 = 2 (CM)
The bottom area of the cylinder is: (2 △ 2) & sup2; × 3.14 = 3.14 (CM & sup2;)
Original cylinder volume: 3.14 × (12.56 △ 2)
=7192 (CM) & sup3;
A: the original cylinder volume is CM & sup3