6. A hemi spherical tank is made up of an iron sheet 1cm thick. If the inner radius is 1 m, then find the volume of the iron used to make the tank. 6. A hemi spherical tank is made up of an iron sheet 1cm thick. If the inner radius is 1 m then find the volume of the iron used to make the tank. October 17, 2020 Category: Chapter 13 - Surface Areas and Volumes , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related