The shape factors F12 and F21, for the sphere of diameter 'd' and a cubical box of side 'd', as shown in the figure, respectively are
1
\(\frac{\pi }{6}\) and 1
2
1 and \(\frac{\pi }{6}\)
3
\(\frac{\pi }{3}\) and 1
4
1 and \(\frac{\pi }{3}\)
5
Question Not Attempted