If a Solid silver sphere of radius 3dm is melted and reacted into a solid right circular cylinder rod of length 1dm. Find the diameter of rod.
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A solid metallic sphere of radius 3 decimetres is melted to form a circular sheet of 1 milimetre thickness. The diameter of the sheet so formed is
A) 26 metres
B) 24 metres
C) 12 metres
D) 6 metres
Correct Answer:
D) 6 metres
Description for Correct answer:
Radius = 3 Decimetres = 30 cm
Height of curcular sheet
= 1 mm = 0.1 cm
⇒43π×(30)3=πr2×110
⇒r2=10000×9×4−−−−−−−−−−−√
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