Arif is now 5 times as old as Babu, but 7 years now he will be 3 times as old as babu. How old is Arif now?

Arif is now 5 times as old as Babu, but 7 years now he will be 3 times as old as babu. How old is Arif now? Correct Answer 7

মনে করি, Babu - র বর্তমান বয়স x বছর Arif - এর বর্তমান বয়স 5x বছর প্রশ্নমতে, 5x + 7 = 3(x + 7) ⇒5x +   =  3x  + 21⇒2x  = 14⇒x = 7 Arif - এর বর্তমান বয়স (5×7)  = 35 বছর
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