Question

Calculate the cost of a copper rod 10 cm dia and 2m in length. If density of copper is 7.6 and its rate is Rs 160 per kg?​

Answer 1

Answer:

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Step-by-step explanation:

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  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.