Question

in a hollow cylinder, the sum of the external and internal radii is 14 cm an
width is 4 cm. If its height is 20 cm, the volume of the material in it is​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:



The sum of internal and external radius is 14 cm and width is 4 cm. This implies that internal radius is 14 - 4 cm = 10 cm.

Formula for volume of cylinder = pi * r^ 2 * h

3.14 * 10 ^ 2 * 20 = >        3.14   *  100 * 20  =  6280 cm³

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