দুধ-জলের মিশ্রণের 2/3 ভাগ ছিল দুধ। 21 লিটার মিশ্রণ ছিল। যদি এতে 4 লিটার জল যোগ করা হয়, তাহলে নির্ণয় করে বলুন নতুন মিশ্রণে দুধের শতাংশ কত?

This question was previously asked in
RRB ALP Previous Paper 2 (Held On: 9 Aug 2018 Shift 2)
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  1. 44
  2. 56
  3. 14
  4. 11

Answer (Detailed Solution Below)

Option 2 : 56
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মোট আয়তন = 21 লিটার

দুধ-জলের মিশ্রণের 2/3  ভাগ ছিল দুধ,

⇒ দুধের আয়তন = 2/3 × 21 = 14 লিটার

⇒ জলের আয়তন = 21 – 14 = 7 লিটার

এতে 4 লিটার জল যোগ করা হয়,

⇒ নতুন জলের আয়তন = 7 + 4 = 11 লিটার

⇒ মিশ্রণের মোট আয়তন = 14 + 11 = 25

∴ দুধের শতাংশ = 14/25 × 100 = 56%
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