A copper wire,3 mm in diameter, is wound about a cylinder whose length is 1.2 m, and diameter 10 cm, so as to cover the curved surface of the cylinder. Find the length and mass of the wire, assuming the density of copper to be `8.88g/(cm^3)`.

Find the height of the cylinder whose volume is 1.54 m^3 and diameter of the base is 140 cm?

From a solid cylinder whose height is 2.4 cm and diameter 1.4 cm a conical cavity of the same height and same diameter is hollowed out.Find the total surface area of the remaining solid to the nearest cm^2 .

From a solid cylinder of height 2.4 cm and diameter 1.4 cm a cone of the same height and same diameter is cut out.Find the total surface area of the remaining portion of the cylinder.

The diameter of a sphere is 6 cm.It is melted and drawn into a wire of diameter 2 mm.The length of the wire is__

A solid iron pole consists of a cylinder of height 220cm and base diameter 24 cm,which is surmounted by another cylinder of height 60cm and radius 8 cm.Find the mass of the pole,given that 1cm^3 of iron has approximately 8g mass.(use pi=3.14 ).

Find the height and volume of cylinder whose area of the curved surface is 4,400 cm^2 and perimeter of the base is 110 cm.

The diameter of sphere is 42 cm. If it is melted and drawn into cylindrical wire of 28 cm diameter, find the length of wire.

A silver wire of 1 mm diameter has a charge of 90 coulombs flowing in 1 hours and 15 minutes. Silver contains 5.28*10^28 free electrons per cm^3. Find the current in the wire and drift velocity in the electron?

A rope of negligible mass is wound round a hollow cylfnder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? What is the linear acceleration of the rope? Assume that there is no slipping.

Find the resistance of a silver wire of length 5m and area of cross-section 4mm^2 . Resistivity of a silver is 1.6xx10_-8 Omega m.