alleryतीन रंगारी एकट्याने काम करताना अनुक्रमे 12, 15 आणि 20 दिवस घेतात. जर तिघांनी एकत्र काम केले, तर कामाला लागतील:
A3 दिवस
B4 दिवस
C5 दिवस
D6 दिवस
Answer & Solution
Correct answer: C. 5 दिवस
दररोजचे काम (5 + 4 + 3)/60 = 12/60 = 1/5 भाग आहे, म्हणून 5 दिवस.
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