A person's present age is two-fifth of the age of his mother. After 8 years, he will be one half of the age of his mother. What is the present age of the mother?

A 30

B 35

C 40

D 50

Solution

Correct Answer: Option C

মনে করি,

 মা এর বর্তমান বয়স =x বছর
লোকটির  "         "   =2x/5 "

প্রশ্নমতে ,
     (x+8)/2=(2x/5 )+8
বা,x+8=2(2x/5+8)
বা,x+8=4x/5+16
বা,x-4x/5 =16-8
বা, (5x-4x)/5=8
বা,x/5=8
বা, x =40

মা এর বর্তমান বয়স =40 বছর

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