C-11-Q171mediumsingle_mcqIf a+bb+c=45\dfrac{a+b}{b+c} = \dfrac{4}{5}b+ca+b=54 and a:b=b:ca:b = b:ca:b=b:c, then ac=\dfrac{a}{c} =ca=a1625\dfrac{16}{25}2516b45\dfrac{4}{5}