Question

please solve with full explanation​

Answer 1

Step-by-step explanation:

is correct answer

thickness of wire is 6meters

Answer 2

Answer:

volume of copper rod= volume of wire

volume of copper rod:

copper rod is in form of cylinder with

Diameter of rod = 1cm

so, radius r = 1/2 cm

And, length = height = h= 8 cm

volume of copper rod= πr^2h

= π×(1/2)^2×8

=π×(1/4)×8

=2π cm^3

volume of wire

wire is form of cylinder with

radius = r

lenght= height=18m = 18×100 cm = 1800cm

volume of wire = πr^2h

= πr^2×1800 cm^2

=1800πr^2cm^2

Now,

volume of copper rod= volume of wire

=1800πr^2 =2π

=1800r^2=2

= r^2 = 2/1800

=r^2 =1/900

= r= root 1/900

= r= root1/30×30

= r= root1/30^2

=. r= 1/30

so, r= 1/30

thickness of the wire= diameter of the wire

=2r

= 2×1/30

= 1/15

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