Question

i need it fast:
A copper wire of diameter 6 mm is evenly wrapped around on the cylinder of length 18 and diameter 49 cm to cover whole surface
CALCULATE:
i) the length
ii) the volume of wire

Answer 1

diameter of wire =6mm
eg- its radius 3mm
length of cylinder=150mm
diameter of cylinder=490mm
no of turns of coppef wire=150/6=25
length of turn
2π (490/2)=990×22/7=1540mm

so total length of copper wire is 25×1540mm=38500
therefore volume of copper wire
π×(3)^×38509mm^=1089000mm^
volume (in cubic centimetre) =1089cm^
specific gravity of wire =9kgcube
sowight of wire =(1089×9)kg
9801=answer