a metal pipe in, cylindrical in shape is of diameter 2cm and height 10 cm . it is melted and recast in a wire of diameter 2.5mm . find the length of wire so obtained
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Answer:
the answer is 160cm or 16m
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Answer:
diameter = 2
radius = 1 cm
height = 10 cm
Wire (cylinder)
diameter = 2.5mm = 0.25cm
radius R = 0.25/2
Vol. of cylinder = vol. of wire (cylinder)
pie r ^2 h = pie R ^2h
0.25/2 ×0.25/2×10 ×1×1 = h
1/16×1/4×10 = h
0.15625 = h
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