Lesson 2.6: Time & Work, Pipes & Cistern
Description:
Time and work questions are based on efficiency and combined work rates.
Key Topics:
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Work Efficiency:
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If A completes work in 10 days, A’s 1-day work = 1/10.
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Combined Work Problems:
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A & B together = 1/10 + 1/15 = 1/6 → 6 days.
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Example:
A can do a job in 8 days, B in 12 days. Together? (8×12)/(8+12) = 96/20 = 4.8 days.