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A new facility has to be designed to do all the welding for 3 products: A, B and C, Per unit welding time for each product is 20 s, 40 s and 50 s respectively. Daily demand forecast for product A is 450, for B is 360 and for C is 240. A welding line can operate efficiently for 220 minutes a day. Number of welding lines required is: 
  • a)
    5  
  • b)
    4  
  • c)
    3  
  • d)
    2  
Correct answer is option 'C'. Can you explain this answer?
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Calculation:

To determine the number of welding lines required, we need to consider the welding time for each product and the daily demand forecast.

1. Calculate the total welding time required for each product:
- Product A: 450 units/day * 20 s/unit = 9000 s/day
- Product B: 360 units/day * 40 s/unit = 14400 s/day
- Product C: 240 units/day * 50 s/unit = 12000 s/day

2. Calculate the total welding time for all products:
Total welding time = 9000 s/day + 14400 s/day + 12000 s/day = 35400 s/day

3. Convert the total welding time to minutes:
Total welding time = 35400 s/day * (1 min/60 s) = 590 min/day

4. Determine the number of welding lines required:
Number of welding lines = Total welding time / Operating time per welding line

Operating time per welding line = 220 min/day

Number of welding lines = 590 min/day / 220 min/day = 2.68

Conclusion:
Since we cannot have fractional welding lines, the number of welding lines required is rounded up to the nearest whole number. Therefore, the correct answer is option 'C' which is 3 welding lines.
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A new facility has to be designed to do all the welding for 3 products: A, B and C, Per unit welding time for each product is 20 s, 40 s and 50 s respectively. Daily demand forecast for product A is 450, for B is 360 and for C is 240. A welding line can operate efficiently for 220 minutes a day. Number of welding lines required is:a)5 b)4 c)3 d)2 Correct answer is option 'C'. Can you explain this answer?
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