Subject
Quantitative Aptitude
Topic
Age
Today is Ratul's 12th birthday and his father's 40th birthday. How many years from today will Ratul's father be twice as old as Ratul's at that time?
Today is Ratul's 12th birthday and his father's 40th birthday. How many years from today will Ratul's father be twice as old as Ratul's at that time?
ক)
12খ)
24গ)
18ঘ)
16Explanation
ধরি, x বছর পর রাতুলের বাবা তার বয়সের দ্বিগুণ হবে। তাহলে, রাতুলের বয়স হবে = ১২ + x বছর তার বাবার বয়স হবে = ৪০ + x বছর প্রশ্ন অনুযায়ী, বাবার বয়স = রাতুলের বয়স × ২ অর্থাৎ, ৪০ + x = ২ × (১২ + x) ⇒ ৪০ + x = ২৪ + ২x ⇒ ৪০ - ২৪ = ২x - x ⇒ x = ১৬Related questions
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