Question

2.2 cubic dm of brass is to be drawn into a cylindrical wire 0.25 CM in diameter find the length of the wire ​

Answer 1

Answer:

Step-by-step explanation:

Let the length of the wire be 'h' cm

1 dm = 10 cm

Volume of metal = 2.2 dm³ = 2.2(10 cm)³

= 2.2*1000

Volume of metal = 2200 cm³

Let 'r' be the radius of the cylinder.

Given : Diameter = 0.25 cm 

So, r = 0.25/2 

r = 0.125 cm

Volume of metal in the wire = 2200 cm³

∴ πr²h = 2200 cm³

⇒ 22/7*(0.125)²*h = 2200

⇒ h = (2200*7)/22*0.015625

⇒ h = 15400/0.34375

h = 44800 cm

Or 44800/10 

 Height = 4480 dm

Answer.