A cylinder with a radius of 1 cm and a height of 21 cm has the same volume as a cone with a height of 7 cm. What is the radius of the cone? A) 3 cm B) 5 cm C) 7 cm D) 9 cm No gu…

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Sojo · Answer 1 · 2019-10-11T11:04:15+0000

option A is correct.

volume of cylinder = volume of cone
(22/7)(1^2)(21) =(1/3)(22/7)(r^2)(7)
9 =r^2
therefore radius = 3cm.