A shopkeeper has one spherical laddoo of radius 5cm. Which the same amount of meterial. How many laddoos of radius 2.5cm can be made?

A shopkeeper has one spherical laddoo of radius 5 cm. With the same amount of material how many laddoos of radius 2.5 cm can made?

A hemispherical bowl has a radius of 3.5 cm What would be the volume of water it would contains?

A spherical ball of iron has been melted and made into small balls. If the radius of each smaller ball is one-fourth of the radius of the original one, how many such balls can be made ?

Plastic drum of cylinder shape is made by melting spherical solid plastic balls of radius 1cm Find the number of balls required to make a drum of thickness 2cm, height 90 cm and outer radius 30cm.

A hemispherical bowl is made of brass .0.25 cm. thickness .The inner radius of the bowl is 5cm. Find the ratio of outer surface area to inner surface area.

A spherical capacitor has an inner sphere of radius 12cm and an outer sphere of radius 13cm. The outer sphre is earthed the inner sphere is given a charge of 2.5muC . The space between the concentric spheres is filled with a liquid of dielectric constant 32. a. Determine hte capacitance of the capacitor. b. What is the potential of hte inner sphere? c. Compare the capacitance of this capacitor with that of an isolated sphere of radius 12cm. Explain why the latter is much smaller.

If the radius of the sphere, with radius 5 cm, has to increase by 0.1 cm approximately. How much will its volume increase ?

The radius of sphere is 3.5 cm Find its surface area and volume .