alleryA और B किसी कार्य को 10 दिनों में, B और C 15 दिनों में, तथा A और C 12 दिनों में पूरा करते हैं। तीनों मिलकर इसे कितने दिनों में पूरा करेंगे?
A9 दिन
B6 दिन
C7.5 दिन
D8 दिन
Answer & Solution
Correct answer: D. 8 दिन
संयुक्त दर का दोगुना = 1/10 + 1/15 + 1/12 = 1/4 है, अतः तीनों मिलकर प्रतिदिन 1/8 भाग कार्य करते हैं (अर्थात कुल 8 दिन लगेंगे)।
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