When measured from outside,the length,breadth and height of a top-open metal box of thickness 0.5cm.were found to be 10cm.,9cm and 2.5cm respectively.Find the volume of the metal needed to make the box and the capacity of the box as well.

The length, breadth and thickness of a block' are measured as 125.6 cm, 6.5 cm and 0.23 cm respectively. Which measurement is least accurate ?

The length, breadth and height of a rectangular block of wood were measured to be l= 12.13+-0.02cm, b= 8.16 +- 0.01 cm, h=3.46 +- 0.01 cm . Determine the precentage error in the volume of the block upto two significant figures.

Metallic sphere of radii 6 cm,8 cm and 10 cm respectively are melted to from a single solid sphere,Find the radius of the resulting sphere.

The length , breadth , and thickness of a sheet are respectively 4.234 m , 1.005 m, and 2.01 cm find the area and the volume of the sheet to correct number of significant figure

A bucket made up of metal sheet is in the form of a frustum of height 16 cm (closed at the lower end but open at the upper end) with radii of the lower and upper ends are 8 cm and 20 cm respectively. Find the cost of the bucket if the cost of the metal sheet used is ₹ 15.00 per 100 cm (pi = 3.14) .

A bucket made up of a metal sheet is in the form of a frustum of a cone. Its depth is 24 cm and the diameters of the top and bottom are 30 cm and 10 cm respectively. Find the cost of milk which can completely fill the bucket at the rate of ₹ 20 per litre and the cost of metal used, if its cost ₹ 10 per 100 cm^2 (pi = 3.14) .

A toy is in the shape of a right circular cylinder with a hemisphere on one end and a cone on the other. The radius and height of the cylindrical part are 5 cm and 13 cm respectively. The radii of the hemispherical and conical parts are the same as that of the cylindrical part. Find the volume and surface area of the toy if the total height of the toy is 30 cm.

A bucket is in the form of a frustum of a cone with capacity of 12,308.8 cm^3 of water. The radii of the top and bottom circular ends are 20 cm and 12 cm respectively. Find the height of the bucket and the area of the metal sheet used in its making (pi = 3.14) .