Question

B, A का उतने ही % है जितना कि A, A+B का है तो बताओ B, A का कितने % है..?
(A)55 (B)60 (C)62 (D)65​

Answer 1

Answer:

62%

Step-by-step explanation:

B, A का X % है

=>  B  = (X/100) A

=> B = XA/100

A, A+B का  X % है

=> A = (X/100)(A + B)

=> A =  (X/100)(A + XA/100)

=> 1 = (X /100) (1  + X/100)

=> 10000 = X ( 100 + X)

=> X² + 100X - 10000 = 0

=> X = (-100 ± √(100² - 4(1)(-10000) )/2

=> X = 61.8

Nearest correct option would be 62 %