Question

plss. urgent.
don't get wrong answer

Answer 1

Given Diameter of copper rod = 2cm.

Then radius r = d/2

                       = 2/2

                       = 1cm.


Given height = 10cm.

We know that volume of copper rod = pir^2h

                                                              = pi * (1)^2 * 10

                                                              = 10pi.




Given the height of wire = 10m = 1000cm.

We know that volume of the wire = pir^2h

                                                         = pir^2 * 1000

                                                         = 1000pir^2 cm^2.


Now,

Volume of the copper rod = Volume of wire.

= > 10pi = 1000pir^2

= > 1/100 = r^2

= > r = 1/10cm.


Now,

Thickness of the wire = 2r

                                     = 2 * 1/10

                                     = 1/5cm

                                     = 0.2cm

                                     = 2mm.




Therefore the thickness of the wire = 2mm.



Hope this helps!

Answer 2

Hi,

Please see the attached file!


Thanks