Question

A metal sphere of radius 5m is to be casted in a wire of length 100m and raduis 0.1 m. Find how many such wires can be formed.

Answer 1

Answer:

Correct option is

C

3.14×10−6Ω−m

R=ρAL

⟹R=ρπr2L

⟹ρ=LRπr2

⟹ρ=1100×3.14×(10−4)2

⟹ρ=3.14×10−6Ω−m

Answer 2

Answer:

Step-by-step explanation:

volume of sphere =4/3 pie. r^3=4/3pie* 5^3=523.59 cubic meter

volume of 1 wire = pie * r^2 * L=pie * 0.1^2 * 100=3.14 cubic meter

number of wires can be formed = 523.59/3.14=166.74

approximately 167 wires can be formed