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CBSE Class 9 Answered

A cubical mass of brass whose edge is 77 cm is drawn into a wire of diameter 3.5 cm. The length of the wire is
Asked by Topperlearning User | 26 Oct, 2017, 12:00: PM
answered-by-expert Expert Answer

Edge of the cubical mass= 77 cm

Volume of the cubical mass (V) = (edge)3= 456533 cm3

This mass is drawn into a wire which would be cylindrical in shape.

Diameter of the wire = 3.5 cm ⇒ radius (r) = 1.75 cm

Let h be the length of the cylindrical wire and V1 denote the volume of the wire.
Thus, volume of cylindrical wire = volume of cubical mass

Error converting from MathML to accessible text.

Thus, length of the wire is 474.32 m.

Answered by | 26 Oct, 2017, 02:00: PM

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