ITPEC IP April 2022 Question 54
ITPEC IP April 2022 — Question 54 of 100
The revised plan increases cost by 200 thousand yen. Under the original plan, Mr. A creates 36 programs at 6 per week, requiring 6 weeks and costing 6 × 300 = 1,800 thousand yen. Mr. B produces half as much as A, or 3 programs per week. Together they produce 9 per week, so they finish in 4 weeks at a combined weekly cost of 500 thousand yen: 4 × 500 = 2,000. The change is 2,000 − 1,800 = 200 thousand yen.
Answer (c)
Why not others:
- the new schedule is shorter, but B's additional cost makes the total higher rather than lower
- 1,200 thousand yen does not account for the reduced four-week duration
Key rule: Compare total cost, not weekly cost: derive duration from combined productivity, then multiply by the combined weekly rate.
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