The external radius of a hollow sphere m...

The external radius of a hollow sphere made of lead sheet of 1 cm thickness in 6cm.. If melting the sphere, a solid circular rod of 2cm radius is made, then find the length of the rod.

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RAMAKRISHNA MISSION VIDYALAYA, NARENDRAPUR
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The external radius of a hollow sphere of thickness 1 cm, made of lead - plate is 6 cm If a solid right circular rod of radius 2 cm is made by melting this hollow sphere , then what will be the length of the rod ?

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