A solid iron rectangular block of dimensions 4.4 m , 2.6 m and 1 m is cast into a hollow cylindrical pipe of internal radius 30 cm and thickness 5 cm.Find the length of the pipe.

A solid iron rectangular block of dimensions 4.4m, 2.6m and 1m is cast into a hollow cylindrical pipe of internal radius 30cm and thickness 5cm. Find the length of the pipe.

Rain water, which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius 20 cm. What will be the height of water in the cylindrical vessel if a rainfall of 1 cm has fallen? (a) 188 cm (b) 189 cm (c) 190 cm (d) 191 cm

In a hot water heating system, there is a cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system.

A box is of dimensions 2.4 m x 1.0 m x 75 cm. Find the volume of the box.

The radius of a solid iron sphere is 8 cm. Eight rings of iron plate of external radius 6 2/3 cm and thickness 3 cm are made by melting this sphere. Find the internal diameter of each ring.

A solid sphere of radius ' r ' is melted and recast into a hollow cylinder of uniform thickness. If the external radius of the base of the cylinder is 4 cm, its height 24 cm and thickness 2 cm, find the value of ' r ' .

In a hot water heating system, there is a cylindrical pipe of length 28m and diameter 5cm. Find the total radiating surface in the system.

A hollow metal sphere of internal and external radii 2 cm and 4 cm respectively is melted into a solid cone of base radius 4 cm. Find the height and slant height of the cone.

A solid rectangular piece of iron measures 6m by 6cm by 2cm. Find the weight of this piece, if 1c m^3 iron weighs 8gm.

A rectangular tank has length = 4 m, width = 3 m and capacity = 30 m^3 . A small model of the tank is made with capacity 240 cm^3 . Find : the dimensions of the model.