Question

a cube of copper of edge 11cm is melted and formed into a cyliderical wire of a diameter 0.5cm . what length of wire will be obtained from the cube.

Answer 1

Given side of a cube = 11cm
Cube is melted to form a cylinder of diameter 0.5cm
Radius = 0.5/2 cm
Since the cube is melted to a cylinder
Volume of cylinder = Volume of cube
⇒πr²h = a³
⇒(22/7) × (0.5/2)² × h = 11³
⇒(22/7) × 0.25/4 × h = 1331
⇒(5.5/28) ×h = 1331
⇒  h= 1331 × 28/5.5
⇒ h = 37268/5.5
∴  h = 6776 cm
∴The length of the wire = 6776cm = 67.76 m

Answer 2

Answer:

67.76m

see the attachment