A cylindrical carton is 15 cm high. If the height is reduced by 2 cm, the surface area will be reduced by 188.4 square cm
What is the circumference of the base of the cylinder
188.4 △ 2 = 94.2 (CM)
What is the base radius of the cylinder
94.2 ﹣ 3.14 ﹣ 2 = 15 (CM)
What is the base area of the cylinder
15 × 15 × 3.14 = 706.5 (cm2)
What is the side area of the cylinder
94.2 × 15 = 1413 (cm2)
What is the surface area of a cylinder
706.5 × 2 + 1413 = 2826 (cm2)
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