Home
Class 9
MATHS
The edges of a triangular board are 6 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

Rs. 2.00

B

Rs. 2.16

C

Rs. 2.48

D

Rs. 3.00.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

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 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 .

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 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.

A solid is composed of a cylinder with hemispherical ends. If the whole length of the solid is 108 cm and the diameter of the hemispherical ends is 36 cm, find the cost of polishing the surface of the solid at the rate of 10 paise per cm^2 .

The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm respectively. Find the cost of painting the vessel all over, at the rate of 5 paise per sq.cm.

A hemispherical dome of a building needs to be painted (see Fig. 13.21). If the circumference of the base of the dome is 17.6 m, find the cost of painting it, given the cost of painting is ₹5 per 100 cm^2 .

A round table cover has six equal designs as shown in fig. If the radius of the cover is 28 cm, find the cost of making the designs at the rate of ? 0.35 per cm^2 . (use sqrt 3=1.7)