Question

1 centimetre cube of copper is drawn into a wire 0.2 millimetre in diameter find the length of the wire​

Answer 1

Answer:

Diameter of wire = 0.2 mm = 0.02 cm

Radius of wire = 0.01 cm

Volume of wire = 1 cm^3

=> pi *r^2 * h = 1

=> Length = 1*7/ 22 *0.01*0.01

=> Length = 7 / 22 * 0.0001

=> Length = 70000/22 cm

=> Length of wire = 700/22 m

Length of wire = 31.8 m

Step-by-step explanation: