Hasan sold an article for 56 taka which cost him x taka . If he had gained x% on his outlay, what was his cost ?

Question

নিচের অপশন গুলা দেখুন

• 40 taka
• None of these
• 36 taka
• 25

Answer 1

সঠিক উত্তর হচ্ছে: 40 taka

ব্যাখ্যা:

56 - x /x = x%

56 - x / x = x/100

5600 - 100x = x²

x² + 100x - 5600 = 0

x² + 140x - 40x - 5600 = 0

( x - 40) ( x + 140) = 0

x = 40