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in Mensuration by (47.8k points)
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In a hollow cylinder, the sum of the external and internal radii is 14 cm and the width is 4 cm. If its height is 20 cm, the volume of the material in it is ___

(1) 560π cm3

(2) 1120π cm3

(3) 56π cm3

(4) 360π cm3

1 Answer

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Best answer

(2) 1120π cm3

R + r = 14 cm

w = 4 cm

h = 90 cm

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