A cylinder with a diameter of 8 cm at the bottom is cut into two pieces vertically along the diameter of the bottom. The surface area is increased by 112 square centimeters. What is the volume of the cylinder

A cylinder with a diameter of 8 cm at the bottom is cut into two pieces vertically along the diameter of the bottom. The surface area is increased by 112 square centimeters. What is the volume of the cylinder

The surface area is increased by 2. The length is the diameter of the bottom of the cylinder, and the width is the area of the rectangle with the height of the cylinder
What is the area of each rectangle
112 △ 2 = 56 (cm2)
What is the height of the cylinder
56 △ 8 = 7 (CM)
What is the volume of a cylinder
(8 △ 2) × (8 △ 2) × 3.14 × 7 = 351.68 (cm3)