alleryٹاسک P اور Q 4 اور 6 h لیتے ہیں اور ایک ساتھ چل سکتے ہیں۔ R دونوں کے بعد 3 h لیتا ہے۔ کم از کم کل؟
A9 h
B8 h
C7 h
D13 h
Answer & Solution
Correct answer: A. 9 h
P اور Q کو ایک ساتھ چلانے میں 6 گھنٹے، اس کے بعد R کے 3 گھنٹے، کل 9 گھنٹے لگتے ہیں۔
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