Question

the diameter of a spherical ball is 18 cm how much leather is required to prepare the research balls​

Answer 1

Diameter of metallic ball =4.2cm

∴ Radius of metallic ball =2.1cm

Volume of metallic ball =  3 4  πr  3  =  3 4 ×π(2.1)  3 =38.81cm  3

​ ⟹ Mass of metallic ball =2.5g/cm  3  ×38.81cm  

3  =97.025g≈97g