Difficulty: Easy
Correct Answer: 48 days
Explanation:
Introduction / Context:
Statements like “one man or two women or three boys can finish in the same time” define fixed equivalence between individual rates. We convert to per-day rates for each category, then add the rates for one man, one woman, and one boy to get the combined rate and hence the time to complete the work together.
Given Data / Assumptions:
Concept / Approach:
Combined rate = rm + rw + rb. Then time = 1 / (combined rate). Keep all fractions exact to avoid rounding errors, and simplify to an integer if possible.
Step-by-Step Solution:
Verification / Alternative check:
The equivalence implies 1 man ≡ 2 women ≡ 3 boys. So 1 man + 1 woman + 1 boy = 1 man + 0.5 man + 0.333… man = 1.833… man. Since 1 man takes 88 days, 1.833… man would take 88 / 1.833… = 48 days, consistent.
Why Other Options Are Wrong:
46, 54, 44, and 52 days do not reflect the exact combined rate 11/528.
Common Pitfalls:
Treating 1 man, 1 woman, 1 boy as equal contributors or miscomputing individual rates from the shared 88-day statement.
Final Answer:
48 days
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