Estimate the cost of the steel for the spherical storage tank in the preceding problem if the steel sheet costs $0.25 per pound. On the basis of the data presented in Fig. 14-56, estimate the fraction of the purchased cost of the tank that is due to the cost for the steel.
![942_45b8ebc9-a3f0-4462-87f3-b38731594796.png](https://secure.tutorsglobe.com/CMSImages/942_45b8ebc9-a3f0-4462-87f3-b38731594796.png)