A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divided the circle into 10 equal sectors as shown in Fig. 5.12. Find :
the total length of the silver wire required.

A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divided the circle into 10 equal sectors as shown in Fig. 5.12. Find : area of each sector of the brooch

Two concentric circles of radii 3.5 cm and 7cm form a sector as shown in the figure. Find the area of the shaded region.

A hand fan is made up of cloth fixed in between the metallic wires. it is in the shape of a sector of a circle of radius 21cm anf of angle 120^@ as shown in the figure. calculate the area of the cloth used and also find the total length of the metallic wire required to make such a fan.

From each corner of a square of side 4 cm a quadrant of a circle of radius 1 cm is cut and also a circle of diameter 2 cm is cut as shown in Fig. 5.23. Find the area of the remaining portion of the square.

A circus tent is made of canvas and is in the form of a right circular cylinder and a right circular cone above it. The diameter and height of the cylindrical part of the tent are 126m and 5m respectively. The total height of the tent is 21m. Find the total cost of the canvas used to make the tent when the cost per m^(2) of the canvas is Rs. 15.

An oil funnel made of tin sheet consists of a 10 cm long cylindrical portion attached to a frustum of a cone. If the total height is 22 cm, diameter of the cylindrical portion is 8 cm and the diameter of the top of the funnel is 18 cm, find the area of the tin sheet required to make the funnel (see Fig ).

Shazli took a wire of length 44cm and bent it into she shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area, the circle or the square? (Take pi=22/7)

A silver wire has a resistance of 2.1 Omega at 27.5^@C , and a resistance of 2.7 Omega at 100^@C . Determine the temperature coefficient of resistivity of silver. Also find the resistance of the silver wire at 0^@C .