Question

a copper rod of diameter 2cm and length 10 cm is drawn into a wire of uniform thickness and length 10m. Find the thickness of wire​

Answer 1

Answer:

We know, 1 m =1000 mm and 1 cm =10 cm

Diameter of the copper Rod =2 cm

Radius of the copper rod =r=1 cm

Length of the Rod =h=10 cm

Length of the wire =h=10 m =1000 cm

Let suppose the radius of the wire =R

From the statement:

Volume of the rod = volume of the wire

πr

2

h=πR

2

H

1×1×10=1000×R

2

or R=

10

1

cm or 0.1 cm

Diameter of the wire =2r=2×0.1=0.2 cm

Therefore,the thickness of the wire is 0.2 cm or 2 mm.

Step-by-step explanation:

hope this will help you