A एक कार्य 8 दिवसांत करू शकतो, तर B ते 18 दिवसांत करू शकतो. जर त्या दोघांनी B पासून सुरू होणार्या पर्यायी दिवसांत कार्य केले तर ते कार्य किती दिवसांत पूर्ण होईल?

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  1. 11
  2. 12
  3. 10
  4. 10

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Option 1 : 11
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दिलेले आहे: 

A एक कार्य 8 दिवसांत करू शकतो, तर B ते 18 दिवसांत करू शकतो. 

वापरलेली संकल्पना:

कार्यक्षमता = (एकूण कार्य / घेतलेला एकूण वेळ)

कार्यक्षमता = एका दिवसात केलेले कार्य 

गणना:

एकूण कार्य 72 एकक आहे असे मानू (8 आणि 18 चा लसावि)

A ची कार्यक्षमता 72 / 8 = 9 एकक आहे 

B ची कार्यक्षमता  72 / 18 = 4 एकक आहे 

2 दिवसांत ते 9 + 4 = 13 एकक करतात

ते 65 एकक काम करतात 5 × 2 = 10 दिवसांत 

तर B हा 1 दिवसांत 4 एकक करतो

तर A हा 1/3 दिवसांत 3 एकक करतो

एकूण दिवसांची संख्या 10 + 1 + 1/3 = 11 असेल">34Unknown node type: span34Unknown node type: span34Unknown node type: span34Unknown node type: span

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