There are cuboidal boxes as shown in the adjoinimg figure.Which box requires the lesser amount of material to make?

A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high. (i) Which box has the greater lateral surface area and by how much ? (ii) Which box has the smallest total surface area and by how much ?

A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long. 10 cm wide and 8 cm high. Which box has the greater lateral surface area and by how much ?

A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long. 10 cm wide and 8 cm high. Which box has the smaller total surface area and by how much ?

A ray of light falls on a transparent sphere sphere with centre C as shown in the figure. The ray emerges from the sphere parallel to the line AB. Find the angle of refraction at A, if refractive index of the material of the sphere is sqrt(3) .

A round table cover has six designs of equal area as shown is the figure. If the radius of the cover is 28cm, find the cost of making the designs at the rate Rs. 0.35 per cm^2

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.

Two thick wires and two thin wires, all of same material and same length from a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow at the centre of the loop will be zero in case of