n this case, the total work units are calculated as \(4\text{\ people}\times 40\text{\ minutes}=160\text{\ person-minutes}\) . The time taken for \(8\) people to complete the same work is found by dividing the total work units by the new number of people. This calculation is performed as \(\frac{160\text{\ person-minutes}}{8\text{\ people}}=20\text{\ minutes}\)
if 4 people can do a work in 40 minutes then 8 people can do the same work in ________ minutes:
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the Punjab Police preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.