Question

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

a) 67.76 m
b) 76.67 m
c) 60 m
d) 70 m​

Answer 1

Answer:

please mark as brainliest pleaseeeee

Explanation:

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