Question

please tell me it's answer ....
A wire of length 8 cm and dia 1 cm has been drawn to make a length of 18 meter.find the radius of new wire . I would be thankful to uuu.

Answer 1

volume will remain the same

pie 1/4 . 8= pie r.r .1800.
2/1800 = r.r
1/900 = r.r

1/√900=r
1/30=r