Math, asked by hrutujashahare1069, 11 months ago

Find the length of 13.2 kg copper wire of diameter 4 mm, when 1 cubic cm of copper weighs 8.4 gm.

Answers

Answered by rajukammari
2

Answer:

1 cubic.cm...8.4÷1000kg

?...............13.2kg

13.2×1×1000÷8.4

volume= 1571.43cub.cm

d=4mm

=4÷10cm

=0.4cm

r=0.2cm

v=22r^2h÷7

1571.43=22×0.2×0.2×h÷7

h=1571.43×7÷(22×0.2×0.2)

h=12500cm approx

Answered by Anonymous
1

The length of the wire is 125m.

Weight of copper wire = 13.2 kg  (Given)

Weight of 1 cubic cm wire = 8.4 gm (Given)

Diameter of wire = 4 mm  (Given)

Radius of wire = 4/2 = 2mm

Converting into cm = 2/10 = 0.2cm

Let length of wire = h cm

Volume of wire = πr²h

= 22/7 × 0.2 × 0.2 × h

= 11000/7

h = 12500cm

h = 125m

Thus, the length of the wire is 125m.

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