$$ \text { In relation to additive manufacturing, match the following } $$
| Process | Layer creation technique | Material | |||
| P. | Stereolithography | 1. | Injection of powder stream | I. | Paper |
| Q. | Fused deposition modeling | 2. | Extrusion of melted polymer | II. | Epoxy |
| R. | Laminated object manufacturing | 3. | Liquid layer curing | III. | Titanium |
| S. | Laser-engineered net shaping | 4. | Sheet material deposition | IV. | Acrylonitrile butadiene styrene (ABS) |
Two metal parts (a cylinder and a cube) of same volume are cast under identical conditions. The diameter of the cylinder is equal to its height. The ratio of the solidification time of the cube to that of the cylinder is ___________ (rounded off to 2 decimal places).
Assume that solidification time follows Chvorinov's rule with an exponent of 2 .
Cylindrical workpieces of diameter 60 mm and length 400 mm are machined on a lathe at a cutting speed of $25 \mathrm{~m} \mathrm{~min}^{-1}$ and a feed of $0.2 \mathrm{~mm} \mathrm{rev}^{-1}$. The Taylor's tool life parameters $C$ and $n$ for this setup are 75 and 0.25 , respectively. The tool changing time is 3 minutes. With a labor and overhead cost of Rs. 5 per minute, the tool changing cost per piece is Rs. ___________ (rounded off to 2 decimal places).