Question

1.1cm cube of gold is drawn in to a wireb of0.1 mm in diameter find the length in metre

Answer 1

heya!

here's ur answer...

volume of the gold=volume of the wire

given diameter=0.1mm

therefore radius=0.05mm

volume of the gold=1.1cm³

in mm=1.1×10

=11mm³

we know that the wire is in the shape of cylinder

πr²h=11mm³

22/7×0.05×0.05×h=11mm³

0.055/7×h=11mm³

h=11/1×7/0.055

h=200×7

h=1400mm

hence, the length of the gold wire is 1400mm.

hope this helps...