plzz answer this.....fast ques no 1
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Ans. Number of rounds to cover 12 cm, i.e. 120 mm = 120/3 = 40
Here, Diameter = 10 cm, Radius (r)= 10/2 cm
Length of the wire in completing one round
= 2πr=10πcm
Length of the wire in completing 40 rounds
=10π×40=400π cm
Radius of the copper wire =3/2 mm
= 3/20 cm
Volume of wire = π(3/20)²400π
= 9π² cm³
Mass of the wire = 9×(3.14)²8.88
= 787.98 g
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