One-fifth of a number is equal to 3 of another number. If 35 is added to the first number, it becomes four times of the second number. The second number is-

A 40

B 50

C 60

D 70

Solution

Correct Answer: Option A

মনে করি ,প্রথম সংখ্যাটি x
এবং দ্বিতীয় সংখ্যাটি =y
প্রশ্নমতে ,1/5.x=5/8.y
                x=25y/8..................i
এবং x+35=4y
বা, 25y/8 +35=4y
বা, 35=4y-25y/8
বা, 35=(32y-25y)/8
বা,  35=7y/8
     y=40

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