a cube of edge 14cm is melted from a cylindrical wire of diameter 7mm. what is the length of the wire
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I'm not able to answer this question because there is no option for answering and I know the answer
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hey man you answer is wrong because the 0.7 is the diameter
I am really very sorry for the mistake
it's ok and the correct answer is 7127.27.... cm
Answered by
5
cube s = 14 cm
volume= s^3 = 14^3 = 2744 cm^3
now,
v of cube = v of cylindrical wire....................(1)
d of cylindrical wire = 7mm = 0.7 cm
r = 0.7/2 cm
vol of cylindrical wire = pi * r^2 * h
from (1)
=>2744 = 22/7 * 0.7/2 * 0.7/2 * h
By equating, we get
h = 7127.27 cm (approx)
yes your answer is correct because my answer is the same
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