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The radius of a solid iron sphere is 8cm. 8 rings of iron plate of external radius 20/3cm and the thickness 3cm are made by melting this sphere. Find the internal diameter of each ring

Vaibhav , 8 Years ago
Grade 10
anser 1 Answers
Vikas TU

Last Activity: 8 Years ago

Volume would be same.
Volume for big sphere = Volume of total small spheres.
4*pi*8^3/3 = 8*pi*((20/3)^3 – r^3)*3
on solving we get,
r = 4 cm.

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