![A metallic wire of uniform cross-section is melted to form 28 small solid spheres of radius 12.6 cm each](https://www.gkseries.com/blog/wp-content/uploads/2024/04/A-metallic-wire-of-uniform-cross-section-is-melted-to-form-28-small-solid-spheres-of-radius-12.6-cm-each.jpg)
A metallic wire of uniform cross-section is melted to form 28 small solid spheres of radius 12.6 cm each. If the radius of wire is 1/7 time more than the radius of each sphere, what is the length of the wire?
(a) 260 cm
(b) 360 cm
(c) 326 cm
(d) 390 cm
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2024/04/image-253-1024x303.png)