Question

many lead balls of diameter 3cm are melted and casted into a big spherical tyre of volume 729cmcube.
How many lead balls are melted to form the spherical tyre​

Answer 1

Answer:

Diameter of the ball = 3 cm

radius = 3/2 cm

Volume of 1 lead ball = 4/3πr3

=4/3*22/7*3/2*3/2*3/2

=99/7cm3

Volume of big spherical tyre = 729cm3

Number of balls =

$\frac{vol \: of \: big \: tyre}{vol \: of \: 1lead \: ball}$

51 ball (approximately)