# Solution - Volume of a Sphere

Account
Register

Share

Books Shortlist
ConceptVolume of a Sphere

#### Question

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 cm2 and black paint costs 5 paise per cm2.

#### Solution

You need to to view the solution
Is there an error in this question or solution?

#### Similar questions

A hemispherical tank is made up of an iron sheet 1 cm thick. If the inner radius is 1 m, then find the volume of the iron used to make the tank.

["Assume "pi=22/7]

view solution

The diameter of a sphere is decreased by 25%. By what per cent does its curved surface area decrease?

view solution

Find the volume of a sphere whose surface area is 154 cm2.

["Assume "pi=22/7]

view solution

Twenty seven solid iron spheres, each of radius r and surface area S are melted to form a sphere with surface area S'. Find the

(i) radius r' of the new sphere, (ii) ratio of S and S'.

view solution

Find the amount of water displaced by a solid spherical ball of diameter 0.21 m.

["Assume "pi=22/7]

view solution

S