alleryA आणि B ला 10 दिवस, B आणि C ला 15 दिवस, A आणि C ला 12 दिवस लागतात. तिघांना मिळून लागणारा वेळ:
A9 दिवस
B6 दिवस
C7.5 दिवस
D8 दिवस
Answer & Solution
Correct answer: D. 8 दिवस
एकत्रित दराची दुप्पट 1/10 + 1/15 + 1/12 = 1/4 आहे, म्हणून तिघे मिळून दररोज 1/8 काम करतात, म्हणजेच तिघांना मिळून 8 दिवस लागतील.
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