Question

Find the no. of lead balls of radius 1cm each that can be made from a sphere of radius 4cm.​

Answer 1

Answer:

In the given sphere

radius=8 cm

V  

1

​  

Volume of the sphere=  

3

4

​  

πr  

3

 

=  

3

4

​  

π(8)  

3

=  

3

2048

​  

πcu.cm

In the given ball  

radius = 1 cm.

V  

2

​  

=Volume of the ball=  

3

4

​  

πr  

3

=  

3

4

​  

π(1)  

3

=  

3

4

​  

πcu.cm

Number of balls  

V  

2

​  

 

V  

1

​  

 

​ =  

3

204

​ ×  

4π

3

​ =512 balls