The height of a cylinder is equal to the circumference of its bottom. If the height is shortened by 3 cm, the surface area will be reduced by 94.2 square cm. Find the side area of the cylinder

Perimeter of bottom surface:
94.2 △ 3 = 31.4 (CM)
The lateral area is: 1
31.4 × 31.4 = 985.96 (cm2)

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