The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45cm and 30 cm in length.Find the total cost of polishing the floor,if the cost per `m^2` is ₹4.

A floral design on a floor is made up of 16 tiles which are triangular, the sides of the triangle being 9 cm, 28 cm and 35 cm. Find the cost of polishing the tiles at the of 50 paise cm ^2 . (see the given figure).

The slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of white washing its curved surface at the cost of Rs 210 per 100m^(2).

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 diagonals of a rhombus measure 16 cm and 30cm. Find its perimeter.

A storage tank consists of a circular cylinder with a hemisphere stuck on either end. If the external diameter of the cylinder be 1.4 cm and its length be 8 m. Find the cost of painting it on the outside at rite of Rs. 20per m^2 .

The slant height and base diamater of a conical tomb are 25 m and 14m respectively. Find the cost of with-washing its curved surface at the rate of Rs 210 per 100 m^(2).

Find the area of a rhombus whose side is 6cm and whose altitude is 4 cm.If one of the diagonals is 8cm long,find the length of the other diagonal.

A cylindrical pilar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs 12.50 per m^(2).

A verandah of width 2.25m is constructed all along outside a room which is 5.5m long and 4m wide. Find: the cost of cementing the floor of the verandah at the rate of Rs. 200 per m^2 .

The length and breadth of a rectangular piece of land are 500m and 300m respectively. Find: (i) its area (ii) the cost of the land, if 1m^2 of the land costs rs10,000.