alleryकार्य P और Q 4 और 6 h लेते हैं और एक साथ चल सकते हैं; R दोनों के बाद 3 h लेता है। न्यूनतम कुल?
A9 h
B8 h
C7 h
D13 h
Answer & Solution
Correct answer: A. 9 h
P और Q को एक साथ चलाने में 6 घंटे लगते हैं, उसके बाद R के 3 घंटे, कुल मिलाकर 9 घंटे लगते हैं।
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