Question

15. A piece of ductile metal is in the form of a cylinder of diameter 1 cm and length 11 cm. It is
drawn out into a wire of diameter 1 mm. What will be the length of the wire so obtained?
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Answer 1

Answer:

X=1100cm

its a right ans I am sure

Answer 2

Volume of the initial piece

(pi) * (1/2)^2*11

Volume of the wire of length ‘l’

(pi)*(0.1/2)^2*l

Volume remains the same in both cases

So,

(pi) * (1/2)^2*11 = (pi)*(0.1/2)^2*l

or,

l = (1/0.1)^2*11 = 110 cm

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