Question

heya brainliacs

please solve it 9 one

answer is 5.5 kg

Answer 1

Volume of the Spherical lead ball = 4/3πr³
= 4/3*22/7*1.05*1.05*1.05
Volume of the lead ball = 4.851 cu cm
Lead used for making lead ball = 11.34 g/cu cm
So, the weight of the lead ball = 11.34 × 4.851
Weight of the lead ball = 55.01 grams

Answer 2

Given,
Diameter of lead ball =2.1 cm.
From this finding radius =2.1/5=1.05 cm [ As radius = diameter/2]
Density of the lead ball = 11.34g/c.c


We know that,
Volume of a sphere = 4/3πr³

Volume of lead ball

= 4/3(22/7)*(1.05)³

=4.85 cm^3

Now, Density = Mass / Volume

=> Mass = Density * Volume = 4.85*11.34 g

= 55 g.

= 0.055 kg.

Therefore, The mass of the lead ball is 0.055 kg