danoct2004
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
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
Answers & Comments
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
Verified answer
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