A cylinder has a radius of 2 point 8 inches and a height of 2 point 4 inches. Which cylinder is similar?

Similar cylinders have the same ratio of radius to height. The original ratio is 2.8 ÷ 2.4 = 7/6, and choice D has ratio 1.4 ÷ 1.2 = 7/6, so its dimensions are both half the original dimensions. The cylinder with radius 1.4 inches and height 1.2 inches is similar.

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