The given ball is wrapped evenly with a bubble wrap of thickness of 2 cm. The diameter of the parcel (in cm) will be:
A copper wire of diameter 6 mm is evenly wrapped on a cylinder of length 18 cm and diameter 49 cm to cover its whole surface. Find the length and the volume of the wire. If the density of the copper be 8.8 g per cm3, then find the weight of the wire.