Question

How many spherical balls of diameter 1cm can be made from an iron ball of diameter 8 cm

Answer 1

diameter of iron ball=8cm
radius of iron ball=4cm
Area of iron ball= pie x radius x radius
=22/7 x4x4
=50.28cm sq
diameter of balls =1cm
radius =1/2
area of balls =22/7x1/2x1/2
=0.78cmsq
no. of balls that can be made out of iron ball=50.28/0.78
=64 complete balls

Answer 2

Answer:

Step-by-step explanation:

Volume of sphere = 4/ 3×22/7×r^3

Volume of iron ball(sphere)=4/ 3× 22/ 7× R^ 3

So, volume of sphere × n= volume of iron ball

4/3 × 22/ 7 × r^ 3 ×n = 4/ 3 × 22/ 7 × R^ 3

r^3 × n = R^ 3

1^3 × n = 4^ 3

1 × n = 64

So, n=64