It can be observed that 1 round of wire will cover 3 mm height of cylinder.

Length of wire required in 1 round = Circumference of base of cylinder = 2πr = 2π × 5 = 10π

Length of wire in 40 rounds = 40 × 10π

=(400 x 22)/7 =8800/7

=1257.14 cm =12.57 m

Radius of wire =0.3/2 = 0.15cm

Volume of wire = Area of cross-section of wire × Length of wire

= π(0.15)^{2} × 1257.14

= 88.898 cm^{3}

Mass = Volume × Density

= 88.898 × 8.88

= 789.41 gm