alleryA किसी कार्य को 16 दिनों में और B 8 दिनों में पूरा करता है। A अकेले 4 दिनों तक कार्य करता है, फिर B उसके साथ शामिल होता है। शुरुआत से कुल कितना समय लगा?
A7 दिन
B6 दिन
C9 दिन
D8 दिन
Answer & Solution
Correct answer: D. 8 दिन
A अकेले 1/4 कार्य करता है; शेष 3/4 कार्य को 3/16 प्रति दिन की दर से पूरा करने में 4 दिन लगते हैं, अतः कुल 8 दिन लगेंगे।
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