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Grade: 10
        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
one year ago

Answers : (1)

Vikas TU
6887 Points
							
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.
one year ago
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