Question

a copper of diameter 4 mm is evenly wound around a cylinder whose length is 24 cm and diameter is 20 cm so as to cover while surface fund the length of wire

Answer 1

hope the answer is correct

Answer 2

Answer:

Length of the cylinder = 24 cm Diameter of copper wire = 4 mm = 0.4 cm

Therefore, the number of rounds of wire to cover the length of cylinder

Now, diameter of cylinder = 20 cm

Therefore, length of wire in one round = circumference of base of the cylinder = d cm

Length of wire for covering the whole surface of cylinder = length of wire in 60 rounds

Radius of copper wire = cm = 0.2 cm

Therefore, volume of wire = r2h

= 474.122 cu. cm

Weight of wire = volume × density = 474.122 × 8.68 gm = 4115.38 gm = 4.11538 kg 4.12 kg

Step-by-step explanation: