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 (See Fig.
). Find the cost of polishing the tiles at the rate of 50 p per `cm^2`.

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 (See figure). Find the cost of polishing the tiles at the rate of 50 p per cm^(2) .

A floral design on a floor of 16 tiles, each triangular in shae having sides 16 cm, 12 cm and 20 cm. Find te cost of polishing the tiles at Rs 2 per sq. cm.

The edges of a triangular board are 6 cm, 8 cm and 10 cm. The cost of painting it at the rate of 9 paise per cm^2 is :

A cylindrical vessel open at the top has a dimeter 20 cm and height 14 cm. Find the cost of tin-plating it on the inside at the rate of 70 paise per 100 cm^2 .

A cylindrical pillar is 50 cm in diameter and 3.5 m high. Find the cost of white washing its curved surface at the rate of Rs 40 per m^2 .

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

A hemispherical bowl made of brass has inner diameter 105 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100 cm^2 .

A wooden toy is in the form of a cone surmounted by a hemisphere. The diameter of the base of the cone is 6 cm. and its height is 4 cm. Find the cost of painting the toy at the rate of Rs. 50 per 1000cm^2 .