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In a single pass turning operation the cutting speed is the only variable based on the cutting time cost and the cutting edge cost. The tool life for minimum cost given that cost of 1 cutting edge is Rs. 5, operator wages including the machine tool cost is Rs. 75/hour and tool life equation is VT0.1 is 100
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- 10
- 17
- 29
- 36
Correct Option: D
| Topt = |  | - 1 |  | Tc | |
| n |
Tc1 = 5
| n = | = | |||
| 1.25 | ||||
| 100 |
n = 4 rs/piece
| Topt = | × 4 | |
| 0.1 |
Topt 36 min
