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.

Find the difference in the area of a sector of angle 120^@ and its corresponding major sector in a circle of radius 21cm.

The radius of a circle is 21cm. Calculate the area and perimeter of a sector with an angle of 120^@ at the centre.

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.

In a circle of radius 21cm , an arc subtends an angle 60^@ at the centre. Find (i) the length of the arc (ii) area of the sector formed by the arc (iii) area of the segment formed by the corresponding chord.

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)

i] List the differences between electrical resistance and resistivity of conductor. ii] A copper wire of resistivity 1.63xx10^(-8)Omega-m has cross section area of 10.3xx10^(-4)cm^(2) . Calculate the length of the wire required to make a 20Omega coil.

A container , openedfrom the top and made up of a metal sheet, is in the from of a frustum of a cone of height 16 cm with radii of its lower and upper ends as 8 cm and 20 cm respectively . Find the total cost of milk which can completely fill the container at the rate of Rs 20 per liter . Also find the cost of metal sheet used to make the conatainer, if it costs Rs 8 per 100 cm^(2)

The bottom of a light cylindrical shaped vessel made from metallic sheet is closed by a cone shaped vessel as shown in the figure. The radius of the circular base of the cylinder and radius of the circular base of the cone each is equal to 7 cm . If the height of the cylinder is 20 cm & height of the cone is 3 cm, calculate the cost of milk of fill completely this vessel at the rate of Rs. 20/liter.

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