alleryసీత ఒక పనిని 30 రోజుల్లో చేస్తుంది. సీత మరియు తార కలిసి దానిని 20 రోజుల్లో పూర్తి చేస్తారు. తార ఒక్కరికే పట్టే సమయం
A40 రోజులు
B45 రోజులు
C50 రోజులు
D60 రోజులు
Answer & Solution
Correct answer: D. 60 రోజులు
తార రేటు 1/20 - 1/30 = 1/60, కాబట్టి ఆమెకు 60 రోజులు అవసరం.
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