sai776prathiba sai776prathiba
  • 25-05-2020
  • Mathematics
contestada

a metallic sphere of radius 10 .5 cm is melted and then recast into small cones each of radius 3.5 cm and height 3 cm the number of such cone is

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kbrookins kbrookins
  • 25-05-2020

Answer:

1=1+2

Step-by-step explanation:

2+2+3+7\

Answer Link
devishri1977
devishri1977 devishri1977
  • 25-05-2020

Answer:

Step-by-step explanation:

Number of cones = Volume of Sphere/Volume of one cone

Volume of sphere = (4/3)πr³

[tex]=\frac{4}{3}\pi *10.5*10.5*10.5\\\\=4*\pi *3.5*10.5*10.5\\\\=1543.5\pi cubic cm[/tex]

Volume of cone= (1/3)πr²h

[tex]=\frac{1}{3}*\pi *3.5*3.5*3\\\\=\pi *3.5*3.5\\\\=12.25\pi cubic cm[/tex]

Number of cones = 1543.5π / 12.25π

       = 126 cones

Answer Link

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