পিটার ও প্রীতির বয়সের পার্থক্য হল 5 বছর। 35 বছর আগে যখন তারা একে অপরকে বিয়ে করেছিল, তখন পিটারের বয়সের 4 গুণ প্রীতির বয়সের 5 গুণ ছিল। তাদের বয়সের বর্তমান যোগফল কত?

This question was previously asked in
RRB ALP Previous Paper 6 (Held On: 13 Aug 2018 Shift 1)
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  1. 105 বছর
  2. 110 বছর
  3. 115 বছর
  4. 112 বছর

Answer (Detailed Solution Below)

Option 3 : 115 বছর
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Detailed Solution

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ধরি, পিটার এবং প্রীতির বয়স হল যথাক্রমে A এবং B

পিটার ও প্রীতির বয়সের পার্থক্য হল 5 বছর,

⇒ A – B = 5

35 বছর আগে, পিটারের বয়স 4 গুণ ছিল প্রীতির বয়সের 5 গুণ,

⇒ 4(A – 35) = 5(B – 35)

⇒ 4A – 140 = 5B – 175

⇒ 5B – 4A = 35

সমাধান করে পাই,

⇒ 5B – 4(5 + B) = 35

⇒ 5B – 20 – 4B = 35

⇒ B = 55

⇒ A = 60

∴ তাদের বর্তমান বয়সের যোগফল = 60 + 55 = 115 বছর

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