alleryA आणि B ची कार्यक्षमता 4:5 या गुणोत्तरात आहे आणि एकत्र मिळून त्यांना 20 दिवस लागतात. एकट्या A ला लागणारे दिवस:
A40 दिवस
B36 दिवस
C50 दिवस
D45 दिवस
Answer & Solution
Correct answer: D. 45 दिवस
एकूण काम 9 युनिट x 20 दिवस = 180 युनिट आहे, आणि A दररोज 4 युनिट करतो, म्हणून 45 दिवस.
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