Solution
solving the given equations
0.6A=0.3B
B=0.4C
C=0.0XA
we need to find the value of x
0.6A=0.3(0.4)(0.0XA)
A on both sides get cancelled
0.0.X=0.6/0.3*0.4
0.00x=0.6/0.12
x/100=5
x=500
hence answer is option B
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