Two baskets together have 640 oranges. If one-fifth of the oranges in the first basket be taken to the second basket then, numbers of oranges in both baskets become equal. The number of oranges in the first basket is-
Solution
Correct Answer: Option C
প্রথম বাক্সের কমলা সংখ্যা =x
দ্বিতীয় বাক্সের কমলা সংখ্যা =y
প্রশ্নমতে x+y =640 .............i
এবং x-x এর 1/5 =y+xএর 1/5
বা, x-x/5=y+x/5
বা , x-(x/5)-(x/5)=y
বা , (5x-x-x)5=y
বা ,3x5=y
বা,y=3x5
∴(i)
x+3x/5=640
(5x+3x)/5=640
8x/5=640
x=(640×5)8
∴ 400
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