A solid metallic cyclinder of length is 21ccm and diameter is 14cm is melted and made into shorter cyclinder of double diameter. Find its new length
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Step-by-step explanation:
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Answered by
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Answer: 5.25cm
Step-by-step explanation:
original cylinder : d = 14cm, r = 7cm, h = 21cm
new cylinder : D = 14*2 = 28, R = 14cm, H = ?
Volume of original cylinder = Volume of new cylinder
πrrh = πRRH
7*7*21 = 14*14*H
1029 = 196H
H = 5.25cm
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