# Ratio

Algebra Level 2

If $$A:B=2:3, B:C=5:7$$ and $$C:D=3:10$$, then find the value of $$A:D$$.

If the ratio can be written in the form $$X:Y$$, where $$X$$ and $$Y$$ are coprime positive integers, submit the answer as $$X+Y$$.

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