alleryकार्ये P आणि Q 4 आणि 6 h घेतात आणि एकत्र चालू शकतात; R दोन्ही नंतर 3 h घेते. किमान एकूण?
A9 h
B8 h
C7 h
D13 h
Answer & Solution
Correct answer: A. 9 h
धावण्यासाठी P आणि Q एकत्रितपणे 6 तास लागतात, त्यानंतर R चे 3 तास, एकूण 9 तास.
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