The difference between a number and its two-fifth is 510. What is 10% of that number?

एक संख्या और उसके 2/5 के बीच का अंतर 510 है। उस संख्या का 10% क्या है?

Let the number = x

two-fifth of the number = x*(2/5)

According to the question - x-(2/5)x = 510

= 3x/5 =510

= x =[510 * ( 5/3)]

= x = 850

So the number is 850.

Now 10% of the number -

= 10 % 0f 850

= 85

Hence the correct answer is option B.

माना संख्या = x

संख्या का 2/5 = x*(2/5)

प्रश्न के अनुसार - x-(2/5)x = 510

= 3x/5 =510

= x =[510 * ( 5/3)]

= x = 850

अतः संख्या 850 है l 

संख्या का 10% - 

= 850 का 10 %

= 85

अतः सही उत्तर विकल्प B है।