If ab - 45 and bc - 1516- then 18c2 - a245c2 - 20a2 is equal to

The correct option is C 3771200 ...

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Algebraic Identity: (a - b)(a + b) = a^2 - b^2

If ab = 45 ...

Question

If $\frac{a}{b} = 45$ and $\frac{b}{c} = \frac{15}{16}$ , then $\frac{18 c^{2} - a^{2}}{45 c^{2} + 20 a^{2}}$ is equal to

\frac{133}{300}

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\frac{70}{300}

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\frac{377}{1200}

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\frac{353}{1200}

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