A आणि B एक काम 12 दिवसात पूर्ण करू शकतात. तथापि, काम पूर्ण होण्यापूर्वी A ला  सोडून जायचे होते आणि म्हणूनच हे काम पूर्ण करण्यास 16 दिवस लागले. जर A हा  एकट्याने 21 दिवसांत काम पूर्ण करत असेल तर काम संपण्यापूर्वी किती दिवस आधी A सोडून गेला?

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RRB ALP Previous Paper 4 (Held On: 10 Aug 2018 Shift 2)
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  1. 7
  2. 5
  3. 9
  4. 3

Answer (Detailed Solution Below)

Option 1 : 7
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A हा  एकट्याने 21 दिवसांत काम पूर्ण करू शकतो

A आणि B एक काम 12 दिवसात पूर्ण करू शकतात.

⇒ एकूण काम = (12, 21) चा लसावि = 84

⇒ A चे एक दिवसाचे काम = 4 

⇒ (A + B) चे एक दिवसाचे काम = 7

⇒ B चे एक दिवसाचे काम = 3 

समजा A ने x दिवस आणि B ने 16 दिवस काम केले

⇒ 4x + 3 × 16 = 84

⇒ x = 9 दिवस

∴ A ने 16 - 9 = 7 दिवसांपूर्वी काम सोडले.

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