Home
Class 9
MATHS
A hemispherical dome of a buiding needs ...

A hemispherical dome of a buiding needs to be painted (see the given figure). 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 Rs. 5 per 100 `cm^(2)`.

Promotional Banner

Topper's Solved these Questions

  • SURFACE AREAS AND VOLUMES

    NCERT GUJARATI|Exercise DO THIS|14 Videos

  • SURFACE AREAS AND VOLUMES

    NCERT GUJARATI|Exercise TRY THIS|5 Videos

  • STATISTICS

    NCERT GUJARATI|Exercise THINK AND DISCUSS|1 Videos

  • THE ELEMENTS OF GEOMETRY

    NCERT GUJARATI|Exercise BRAIN TEASER|2 Videos

Similar Questions

Explore conceptually related problems

A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs. 16 per 100 cm^(2) .

A round table top has six equal designs as shown in the figure. If the radius of the table top is 14cm , find the cost of making the designs with paint at the rate of rs 5 Per cm^(2) ( use sqrt(3)=1.732)

The diameter of a hollow hemispherical lid is 7 m. Find the cost of painting outer surfaces of 10 such lids at the rate of Rs. 20 per m^(2) .

Shanta runs an industry in a shed which isin the shape of a cuboid surmounted by a half cylinder (see the given figure). If the base of the shed is of dimension 7mxx15 m , and the hegiht of the coboidal portion is 8m find the volume of air that the shed can hold. Further suppose te machinery in the shed occupies a total space of 300 m^(3) , and there are 20 workers, each of whom occupy about 0.08 m^(3) space on an average . Then how much air is in the shed ? (Take pi=(22)/(7))

The area of a circular playground is 22,176 m^(2) . Find the cost of facing this ground at the rate of Rs.50 per meter.

A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled carboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs. 12 per m^(2) , what will be the cost of painting all these cones ? (Use pi=3.14 and take sqrt(1.04)=1.02 )

The front compound wall of a house is decorated by wooden spheres of diameter 21 cm, placed on small supports as shown in the given figure. Eight such spheres are used for this purpose, and are to be painted silver. Each support is a cylinder of radius 1.5 cm and height 7 cm and is to be painted black. Find the cost of paint required if silver paint costs 25 paise per cm^(2) and black paint costs 5 paise per cm^(2) .

The diameter and height of a cylindrical water tank are 2 m and 14 m respectively. Find the cost of painting its outer curved surface at the rate of Rs. 20 per m^(2) .