alleryA 16 دنوں میں، B 8 دنوں میں کام کرتا ہے۔ A اکیلے 4 دن کام کرتا ہے، پھر B شامل ہوتا ہے۔ شروع سے کل وقت ہے۔
A7 دن
B6 دن
C9 دن
D8 دن
Answer & Solution
Correct answer: D. 8 دن
A صرف 1/4 کرتا ہے۔ بقیہ 3/4 پر 3/16 فی دن 4 دن لگتے ہیں، لہذا 8 دن۔
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