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Question

The radii of two similar right circular cylinders are 5 cm and 2.5 cm. What is the ratio of their altitudes?


  1. 1 : 8

  2. 1 : 3

  3. 2 : 1

  4. 1: 4


Solution

The correct option is C

2 : 1


In similar solids, all corresponding linear dimensions are in the same ratio. Since the ratio of the radii is 2 : 1, the ratio of the altitude is also 2 : 1.

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