a cylinder is 2 metre long and has a diameter 1.4 CM around the curved surface of the cylinder avaya 0.5 CM in diameter has been react so that it may cover completely find the length and volume the wire
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CSA of cylinder = 2πRh= 2π×0.7×200
= 879.64 cm sq.
r = 0.25 cm for wire
circumference of one round of wire = 2π(r+R)
= 2π[0.25+0.7]= 5.97cm
In one round height of wire = 0.5 cm
so for height 200cm
number of round = 200/0.5= 400 round
hence lenght (L) of wire of 400 round = 5.97×400
=2388 cm ____Ans
volume of wire = πr^2L
= π× 0.25^2×2388
= 468.88 cm^3 _____Ans
= 879.64 cm sq.
r = 0.25 cm for wire
circumference of one round of wire = 2π(r+R)
= 2π[0.25+0.7]= 5.97cm
In one round height of wire = 0.5 cm
so for height 200cm
number of round = 200/0.5= 400 round
hence lenght (L) of wire of 400 round = 5.97×400
=2388 cm ____Ans
volume of wire = πr^2L
= π× 0.25^2×2388
= 468.88 cm^3 _____Ans
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